NV10P MULTIFUNCTION VOLTAGE AND FREQUENCY PROTECTION RELAY MANUAL. This document applies to NV10P devices with firmware release 2.90 and following.

Transcription

1 NV10P MULTIFUNCTION VOLTAGE AND FREQUENCY PROTECTION RELAY MANUAL This document applies to NV10P devices with firmware release 2.90 and following. NV10P - Manual

2 TABLE OF CONTENTS N T 1 INTRODUCTION 5 Scope and liability...5 Applicability...5 Conformity...5 Technical support...5 Copyright...5 Warranty...5 Safety recommendations...5 Insulation tests...5 Product identification...6 Environment...6 Graphical conventions...6 Glossary/definitions GENERAL 10 Preface Main features...11 Photo TECHNICAL DATA GENERAL...12 Technical data...12 Insulation...12 EMC tests for interference immunity...12 Voltage dip and interruption...12 EMC tests for interference immunity...12 Emission Mechanical tests Climatic tests Safety Certifications INPUT CIRCUITS...14 Auxiliary power supply Uaux...14 Voltage input circuits...14 Residual voltage input circuit...14 Binary input circuits OUTPUT CIRCUITS...14 Relays MMI COMMUNICATION INTERFACES...15 Local port...15 Remote ports GENERAL SETTINGS FOR INDUCTIVE VTs VERSIONS GENERAL SETTINGS FOR SENSOR VERSIONS PROTECTIVE FUNCTIONS...16 Thermal protection with Pt100 probes Undervoltage - 27 for inductive VTs versions...16 Undervoltage - 27 for electronic sensor versions...17 Positive sequence undervoltage - 27V1 for inductive VTs versions...17 Positive sequence undervoltage - 27V1 for electronic sensor versions...17 Overvoltage - 59 for inductive VTs versions Overvoltage - 59 for electronic sensor versions Ten minutes overvoltage - 59Uavg for inductive VTs versions Ten minutes overvoltage - 59Uavg [1] for electronic sensor versions Residual overvoltage - 59N for inductive VTs versions Residual overvoltage - 59N for electronic sensor versions Negative sequence overvoltage - 59V2 for inductive VTs versions Negative sequence overvoltage - 59V2 for electronic sensor versions Underfrequency (81U)...21 Overfrequency (81O)...21 Frequency rate of change (81R)...22 Breaker failure - BF CONTROL AND MONITORING Frequency tracking Trip Circuit Supervision - 74TCS Circuit Breaker supervision NV10P - Manual

3 Oscillography (DFR) PLC (Programmable Logic Controller) METERING FUNCTION CHARACTERISTICS HARDWARE DESCRIPTION...25 Power supply board...26 CPU board...26 Input board...26 MMI (keyboard, LED and display) SOFTWARE DESCRIPTION...27 Base software...27 Real-time operating system...27 Task...27 Drivers Application Software Data Base Self test (Application) Development tools (Builder) I/O DESCRIPTION Metering inputs Signal processing Conventions...31 Use of measured values...32 Binary inputs Output relays...37 LED indicators Communication interfaces PROTECTIVE ELEMENTS...42 Rated values...42 Thermal protection with RTD thermometric probes Undervoltage Positive sequence undervoltage - 27V Overvoltage Average overvoltage (59avg)...62 Residual overvoltage - 59N...64 Negative sequence overvoltage - 59V Overfrequency - 81O...71 Underfrequency - 81U Application notes about over-under frequency elements - 81U and 81O...77 Frequency rate of change - 81R Breaker failure - BF CONTROL AND MONITORING...86 Logical block - BLOCK Virtual I/O with Ethernet messages Remote tripping...92 Frequency tracking Trip circuit supervision - 74TCS...94 Circuit breaker supervision...97 Oscillography MEASURES, LOGIC STATES AND COUNTERS 100 Measures Protection Delayed inputs Internal states Relays Counters Self test Fault recording - SFR Event recording - SER Oscillography - DFR INSTALLATION PACKAGING MOUNTING ELECTRICAL CONNECTIONS LED ALLOCATION FINAL OPERATIONS NV10P - Manual

4 7 PROGRAMMING AND SETTINGS ThySetter SW ThySetter installation ThySetter use MMI (Man Machine Interface) Reading variables (READ) Setting modifying (SET) TEST COMMUNICATION Circuit breaker commands MMI Password management MENU TREE MAINTENANCE REPAIR PACKAGING APPENDIX APPENDIX A1 - I/O Diagram APPENDIX A2 - Interfaces APPENDIX A3 - Protective functions APPENDIX A4 - Connection diagrams APPENDIX B1 - NV10P Dimensions APPENDIX B2 - V-Sensor Dimensions APPENDIX B3 - ThySensor Dimensions APPENDIX C - Setting table APPENDIX D - Revisions history APPENDIX E - EC Declaration of conformity NV10P - Manual

5 Scope and liability Applicability Conformity 1 INTRODUCTION T I O N This document describes the functions, the technical data of NV10P devices; instructions for mounting, setting and commissioning are included. All the protective functions included in the NV10P version (27, 59, 59N, 81O, 81U, 81R) are exposed; they are valid for the same protective functions included in the Basic versions NV10B (27, 59, 59N). This manual has been checked out, however, deviations from the description cannot be completely ruled out, so that no liability in a legal sense for correctness and completeness of the information or from any damage that might result from its use is formally disclaimed. The information given in this document is reviewed regularly; any corrections and integration will be included in subsequent editions that are identified by the date of revision. We appreciate any suggestions for improvement. We reserve the right to make technical improvements without notice. This manual is valid for NV10P devices with firmware release 2.90 and following. The product complies with the CEE directives: EMC Council Directives: 89/336/EEC Low voltage Directives: 2006/95/CE (replaces 73/23/CEE) Technical support Copyright Warranty Safety recommendations DANGER WARNING CAUTION Contact: Service tecnico THYTRONIC All right reserved; It is forbidden to copy, modify or store material (document and sw) protected by copyright without Thytronic consent. Thytronic warrants devices against defects in materials and workmanship under normal use for a period of ONE (1) YEAR from the date of retail purchase by the original end-user purchaser ( Warranty Period ). The warming contained in this document are all-important for safety; special attention must be paid to the following symbols: Death, severe personal injury or substantial property damage will result if proper precautions are not taken Death, severe personal injury or substantial property damage can result if proper precautions are not taken. Minor personal injury or property damage can result if proper precautions are not taken Installation and commissioning must be carried out by qualified person; Thytronic assumes no responsibility for damages caused from improper use that does not comply all warning and caution in this manual. In particular the following requirements must be met: Remove power before opening it. Verify the voltage absence by means suitable instrumentation on relay connections; attention must be paid to all circuits supplied by external sources (binary input, CT, etc...) Care must be taken when handling metal parts (front panel, connectors). Insulation tests CAUTION Settings must be established on the basis of a coordination study. Numerical values inside examples have educational purpose only; they don t be used, in no way, for actual applications. After insulation tests, hazardous voltages (capacitor charges,...) may be arise; it is advisable to gradually reduce the test voltage avoiding to erase it abruptly. INTRODUCTION NV10P - Manual

6 Product identification Each device is equipped with: Identification label installed on the front side with following informations: code number, phase and residual nominal currents, auxiliary voltage range and CE mark: U n 100V U En 100V U NP 20 kv U AUX Vac/dc NV10P#JA2MM00 Inductive VT versions U AUX Vac/dc NV10P#0A2MM02 Electronic sensor versions Test label with following informations: data, serial number and test operator signature. Environment Graphical conventions The NV10 device must be employed according to the environment conditions shown (see technical data). In case of different environment conditions, appropriate provisions must be provided (conditioning system, humidity control, etc...). If contaminants are present (dust, corrosive substances, etc...), filters must be provided. The CEI/IEC and ANSI symbols is employed where possible: e.g.: 27= ANSI code concerning the undervoltage element. Following text formats are used: The ThySetter [1] menu: Undervoltage - 27 The parameter description (measures, thresholds, operate time,...) and related value: U> element Definite time U>def The display messages (MMI) are shown as: NV10 Notes are highlighted with cursive letters inside colored bar Note: Useful description note Glossary/definitions 27 Undervoltage ANSI code 59 Overvoltage ANSI code 59N Residual voltage ANSI code 81O Overfrequency ANSI code 81U Underfrequency ANSI code 81R Frequency rate of change ANSI code BF Breaker Failure 74VT VT monitoring 74TCS Trip Circuit Supervision DFR SER SFR ANSI IEEE IEC CENELEC Digital Fault Recorder (Oscillography) Sequential Event Recorder Sequential Fault Recorder American National Standard Institute Institute of Electrical and Electronics Engineers International Electrotechnical Commission Comité Européen de Normalisation Electrotechnique 52 o CB (Circuit Breaker) Circuit Breaker 52a Auxiliary contact in the breaker that is in the same position as the breaker. It can be assigned to a binary input to locate the CB position (Breaker failure and/or CB diagnostic functions). (52a open = CB open) 52b Auxiliary contact in the breaker that is in the opposite position as the breaker (52b open = CB closed) Note 1 The graphic interface and the operation of the ThySetter software are described in the relative chapters 66 NV10P - Manual INTRODUCTION

7 K1...K6...K10 Pulse ttr Latched No-latched CT P1 P2 S1 S2 Self test Start Trip Output relays Output relay with pulse operation Output relay minimum pulse width Output relay with latched operation (manual reset) Output relay with latched operation (automatic reset) Output relay with no-latched operation (automatic reset) Current Transformer IEC nomenclature for primary polarity mark of CTs (as an alternative to a ANSI dot) IEC nomenclature for primary polarity mark of CTs (as an alternative to a ANSI no-dot) IEC nomenclature for secondary polarity mark of CTs (as an alternative to a ANSI dot) IEC nomenclature for secondary polarity mark of CTs (as an alternative to a ANSI no-dot) Diagnostic Leave an initial condition or reset condition (Pickup) Operation (with operate time) Operating time Duration of time interval between the instant when the characteristic quantity in reset condition is changed, under specified conditions, and the instant when the relay operates Dropout ratio The ratio of a reset value to an operate value in well-specified conditions. The dropout ratio may be lower or greater than 1 according as an over or under element is considered Reset time Duration of the time interval between the instant when the characteristic quantity in operate condition is changed, under specified conditions, and the instant when the relay operates. The stated reset time is related to a step variation of characteristic quantity in operate condition to the reset condition. Overshoot time The critical impulse time for a relay which is in its reset condition, is the longest duration a specified change in the input energizing quantity(ies) (characteristic quantity), which will cause the relay to change to operate condition, can be applied without the relay switches. The overshoot time is the difference from the operate time and the critical impulse time. The declared values for the overshoot time are applicable with the lower setting value of the operation time. MMI (Man Machine Interface) Operator front panel ThySetter Log file J2SE Subnet Mask Sw Fw Upgrade XML Setting and monitoring software A text file that lists actions that have occurred (ThySetter). Java Platform Standard Edition (Ethernet nomenclature) Software Firmware Firmware upgrade extensible Markup Language INTRODUCTION NV10P - Manual

8 Symbols U>> Threshold setting (e.g. pickup U >>). The value is available for reading and is adjustable by means ThySetter + MMI. U U U >> Limit block (U>> threshold). U L1 U L2 Max[I L1,I L2,I L3 ] U L3 Computation block (Max phase voltage) T 0 Curve type (definite/inverse time) U>> Start IPh Block2 U>> BF_OUT Logic internal signal (output); may be a logical state (e.g.u>> Start) or a numerical value It is available for reading (ThySetter + communication interface) Logic external signal (intput); may be a command coming from a binary input or a sw command It is available for reading (ThySetter + communication interface) Internal signal (e.g. Breaker Failure output state concerning to the 2nd threshold of the 59 element) It is not available for reading (missing arrow) Switch AND and NAND logic gates 1 1 OR and NOR logic gates =1 EXOR logic gate INPUT T t ON RESET 0 ON delay timer with reset (t ON delay) OUTPUT t ON t ON t ON t ON RESET t INPUT T t ON 0 ON delay timer without reset (t ON delay) t ON t ON t ON OUTPUT t INPUT t OFF 0 T OFF delay timer (dropout) without reset (t OFF delay) t OFF t OFF OUTPUT t Symbols-en.ai 88 NV10P - Manual INTRODUCTION

9 INPUT t OFF t OFF t OFF 0 RESET T OFF delay timer (dropout) with reset (t OFF delay) OUTPUT RESET t OFF t INPUT t TR 0 T Minimum pulse width operation for output relays (t TR) t TR t TR OUTPUT t INPUT Latched Latched operating mode for output relays and LEDs OUTPUT t INPUT t TR Pulse operating mode for output relays OUTPUT t TR t TR t Symbols1-en.ai INTRODUCTION NV10P - Manual

10 Preface 2 GENERAL E The relay type NV10P can be typically used in HV, MV and LV distribution systems, on transformers or for electrical machines. It can be used for system decoupling, load shedding and loss of main (islanding) protection. In addition to the main protection element, the breaker failure (BF), Trip Circuit Supervision (TCS) and programmable logic (PLC) are also provided are also provided. Input circuits for inductive VTs TV or direct connection Following input circuits are available: Three voltages (line-to-line) with nominal voltages programmable in the range V (U R=100V) or V (U R = 400V) and one residual voltage input with nominal voltage programmable in the range V (U ER=100V). Input circuits for electronic Sensor Following input circuits are available: Three voltages (line-to-ground) with 20/ 3 kv nominal voltage); the residual voltage is calculated from phase voltages. Setting, programming and reading operations must be effected by means of Personal Computer with ThySetter software or by means of remote communication interface (RS485 bus and Ethernet network); all operations must be performed through MMI if enabled. According to the hardware configurations, the NV10P protection relay can be shipped in various case styles depending on the required mounting options: Flush. Projecting mounting. Rack. With separate operator panel. Other options are: Auxiliary power supply operating range. Communication protocols. NV10P PROTECTION RELAY 2xTV fase-fase 74TCS 81O BF 81U ARF 81R 59Uavg 27 27V V2 59N DDI I DDI Σ 81O 81U U EC NV10P PROTECTION RELAY Uavg U 12, U 23, U 31 59V2 27V1 BF ARF 59N - Protective control functions 27 Phase undervoltage 27V1 Positive sequence undervoltage 59 Phase overvoltage 59V2 Negative sequence overvoltage 59N Residual overvoltage 59Uavg Average overvoltage 81O Overfrequency 81U Underfrequency 81R Frequency rate of change BF Circuit breaker failure 74TCS Trip circuit supervision ARF Automatic reclosure (optional for pv plants) 10 NV10P - Manual GENERAL

11 Main features Metallic case. Backlight LCD 4x16 Display. Eight LEDs that may be joined with matrix criteria to many and various functions. RESET key to clear LED indications and latched output relays. Two free settable binary inputs. Independently settable for start, trip, self-test and control six output relay (K1...K6) Each output relay may be set with normally energized or normally de-energized operating mode and manual or automatic reset (latched/no-latched). Rear Ethernet communication port, with MODBUS TCP/IP or IEC61850 protocol, with RJ45 (copper wires) or FX (optical fiber) connection. Rear RS485 port, with ModBus protocol. RS232 front serial port (local communication for Thysetter). Real time clock with super capacitor. The most significant constructive features are: Galvanically insulated input and output circuits (communication and binary circuits included). Optimum filtering of input signals through combined use of analog and digital filters. Traditional electromechanical-type final output contacts with continuous monitoring of control coil continuity. Auxiliary supply comprising a switching-type voltage stabilizing circuit having a very wide working range and a very small power dissipation Nominal frequency: 50 or 60 Hz. The most significant operating features are: Programming of operating modes and parameters by means of the front keys and alphanumeric display, with a programming procedure based on carrying out guided selections and on explicit and immediate signalling of the operations being performed, so that such procedure can be carried out without coding tables or mnemonic informations. The feature modification operations do not interrupt the normal functions of the relay. Impossibility of programming unacceptable parameter values, thanks to the automatic limitation of top and bottom scale values for the relative setting ranges. Currents are sampled 24 times per period and measured in the effective value (RMS) of the fundamental component using the DFT (Discrete Fourier Transform) algorithm and digital filters. The fault recorder (SFR) runs continuously capturing in circular mode the last twenty events upon trigger of binary input/output and/or element pickup (start-trip). The event recorder (SER) runs continuously capturing in circular mode the last three hundred events upon trigger of binary input/output. Digital fault recorder (DFR) in COMTRADE format (oscillography). Photo GENERAL NV10P - Manual

12 3.1 GENERAL Technical data 3 TECHNICAL C DATA A Mounting: Flush. Projecting. Rack. Separated operator panel. External dimensions (Flush mounting) Terminals Mass (Flush mounting) 177 x 107 x 235 (high x width x depth) screw connection 2.0 kg Insulation Reference standards EN 60529, EN 60529/A1 Degrees of protection provided by enclosures (IP Code) Front IP52 Terminals IP20 Reference standards EN IEC High voltage test (50 Hz - 60 s) Auxiliary power supply 2 kv Input circuits 2 kv Output circuits 2 kv Output circuits (between open contacts) 1 kv Impulse voltage withstand test (1.2/50 μs): Auxiliary power supply 5 kv Input circuits 5 kv Output circuits 5 kv Output circuits (between open contacts) 2.5 kv Insulation resistance >100 MΩ EMC tests for interference immunity Reference standards Product standard for measuring relays EN Voltage dip and interruption Generic standards immunity for industrial environments EN Electromagnetic compatibility requirements for measuring relays and protection equipment EN Apparati di automazione e controllo per centrali e stazioni elettriche Compatibilità elettromagnetica - Immunità ENEL REMC 02 Normativa di compatibilità elettromeccanica per apparati e sistemi ENEL REMC 01 Reference standards EN IEC Voltage dips, short interruptions and voltage variations on dc input power port immunity tests Auxiliary power supply in dc energizing quantity Interruption (UT=40%) 100 ms Interruption (UT=0%) 50 ms Voltage variations (UT= %) 10 s EMC tests for interference immunity Reference standards EN IEC EN EN Damped oscillatory wave 0.1 MHz and 1 MHz common mode 2.5 kv 0.1 MHz and 1 MHz differential mode 1.0 kv Ring wave common mode 2.0 kv Ring wave differential mode 1.0 kv Reference standards EN IEC EN IEC Electrostatic discharge Contact discharge 6 kv Air discharge 8 kv Reference standards EN IEC EN IEC NV10P - Manual TECHNICAL DATA

13 Emission Mechanical tests Climatic tests Radiated radio-frequency fields MHz AM 80% 10 V/m 900 MHz Pulse modulated 10 V/m Reference standards EN IEC EN IEC Fast transient burst (5/50 ns) Auxiliary power supply 2 kv Input circuits 4 kv Reference standards EN IEC EN IEC High energy pulse U aux (line-to-ground 10 ohm, 9 μf) 2 kv U aux (line-to-line 0 ohm, 18 μf) 1 kv I/O ports (line-to-ground 40 ohm, 0.5 μf) 2 kv I/O ports (line-to-line 40 ohm, 0.5 μf) 1 kv Reference standards EN IEC EN IEC Conducted radio-frequency fields MHz AM 80% 1kHz 10 V Reference standards EN IEC EN IEC Power frequency immunity tests Dc voltage 30 V 50 Hz continuously 30 V 50 Hz 1 s 300 V khz 30 V Reference standards EN IEC Magnetic field 50 Hz 50 Hz continuously 100 A/m 50 Hz 1 s 1 ka/m Reference standards EN IEC Damped oscillatory magnetic field Damped oscillatory wave 0.1 MHz 30 A/m Damped oscillatory wave 1 MHz 30 A/m Reference standards EN IEC EN IEC EN CISPR 11 Electromagnetic emission tests Conducted emission auxiliary power supply MHz Conducted emission auxiliary power supply MHz Radiated emission MHz Radiated emission MHz 79 db μv 73 db μv 40 db μv/m 47 db μv/m Reference standards EN EN RMEC01 Vibration, shock, bump and seismic tests on measuring relays and protection equipment EN Vibration tests (sinusoidal) Class 1 EN Shock and bump test Class 1 Reference standards IEC x ENEL R CLI 01 CEI 50 Ambient temperature C Storage temperature C Relative humidity % Atmospheric pressure kpa Safety Reference standards EN Safety requirements for electrical equipment for measurement, control and laboratory use Pollution degree 3 Reference voltage 250 V Overvoltage category III TECHNICAL DATA NV10P - Manual

14 Certifications Reference standards Product standard for measuring relays EN CE Conformity EMC Directive 89/336/EEC Low Voltage Directive 2006/95/CE (replaces 73/23/CEE) Type tests IEC INPUT CIRCUITS Auxiliary power supply Uaux Voltage Nominal value (range) Operative range (each one of the above nominal values) Inrush current (max) 24 V- 6 A, 5 ms 48 V- 14 A, 5 ms 110 V- 20 A, 1 ms 230 V~ 50 A, 1 ms V~/ V~/ V V~/ V~/ V- Frequency (for alternate voltage supply) Hz Max distortion factor ( for alternating voltage supply) 15% Max alternating component (for dc voltage supply): Full wave rectified sine wave 100 % Sine wave 80 % Power consumption: Maximum (energized relays, Ethernet TX) 10 W (20 VA) Maximum (energized relays, Ethernet FX) 15 W (25 VA) Voltage input circuits Relay phase to phase nominal voltage U [1] n V (U R = 100 V) V (U R = 400 V) Relay phase nominal voltage E n = U n / 3 - Permanent overload 1.3 U R Thermal overload (1 s) 2 U R Rated consumption (for any phase) 0.5 VA Residual voltage input circuit Relay residual nominal voltage U En Permanent overload Thermal overload (1 s) Rated consumption V 130 V 200 V 0.5 VA Binary input circuits Quantity 2 Type optocoupler Operative range V~/- Min activation voltage U DIGmin 18 V Max consumption, energized I DIG 3 ma 3.3 OUTPUT CIRCUITS Relays Quantity 6 Type of contacts K1, K2 changeover (SPDT, type C) Type of contacts K3, K4, K5 make (SPST-NO, type A) Type of contacts K6 break (SPST-NC, type B) Nominal current 8 A Nominal voltage/max switching voltage 250 V~/400 V~ Breaking capacity: Direct current (L/R = 40 ms) 50 W Alternating current (λ = 0,4) 1250 VA Make 1000 W/VA Short duration current (0,5 s) 30 A Minimum switching load 300 mw (5 V/ 5 ma) Life: Mechanical 10 6 operations Electrical 10 5 operations Note 1 U R = 100 V or U R = 400 V version must be selected at ordering 14 NV10P - Manual TECHNICAL DATA

15 3.4 MMI Display LCD alfanumerico 16x4 LEDs Quantity 8 ON/fail (green) 1 Start (yellow) 1 Trip (red) 1 Freely allocatable (red) 5 Keyboard 3.5 COMMUNICATION INTERFACES Local port Connection Baud rate Parity Protocol 8 keys RJ bps None Modbus RTU Remote ports RS485 Connection Baud rate Protocol screw terminals bps ModBus RTU IEC DNP3 Ethernet 100BaseT Connection Baud rate Protocol Optical fiber 1300 nm, ST 100 Base TX, RJ Mbps ModBus TCP/IP IEC TECHNICAL DATA NV10P - Manual

16 3.6 GENERAL SETTINGS FOR INDUCTIVE VTs VERSIONS GENERAL SETTINGS FOR SENSOR VERSIONS Relay nominal frequency (f n) 50, 60 Hz Relay nominal voltage (U n) V [1] (step 1 V) V [2] (step 1 V) Relay residual nominal voltage (U En) V (step 1 V) Calculated relay residual nominal voltage (U ECn) U ECn = 3U n Line VT primary nominal voltage (U np) 50 V kv V (step 1 V) V (step 10 V) V (step 100 V) V (step 1000 V) Residual primary nominal voltage (phase-to-phase) 3 (U Enp) 50 V kv V (step 1 V) V (step 10 V) V (step 100 V) V (step 1000 V) Relay nominal frequency (f n) 50, 60 Hz Relay nominal voltage (U n) V [2] (step 1 V) Relay residual nominal voltage (E n) E n = U n/ 3 Calculated relay residual nominal voltage (U ECn) U ECn = 3U n = 3 E n Line VT primary nominal voltage (U np) 50 V kv V (step 1 V) V (step 10 V) V (step 100 V) V (step 1000 V) 3.7 PROTECTIVE FUNCTIONS Thermal protection with Pt100 probes - 26 [3] ThAL1...8 Alarm: Alarm threshold 26 PT1...PT8 (Th AL1...8) C Operating time ThAL1...8 (tth AL1...8) s Th>1...8 Trip: Trip threshold 26 PT1...PT8 (Th> 1...8) C Operating time ThAL1...8 (tth> 1...8) s Undervoltage - 27 for inductive VTs versions Common configuration: 27 Operating logic (Logic27) AND/OR U< Element U< Curve type (U< Curve) DEFINITE/INVERSE [4] Definite time 27 First threshold definite time (U< def) U n (step 0.01 U n) U< def Operating time (t U< def) s s (step 0.01 s) s (step 0.1 s) Inverse time 27 First threshold inverse time (U< inv) U n (step 0.01 U n) U< inv Operating time (t U< inv) s s (step 0.01 s) s (step 0.1 s) Element U<< Definite time 27 Second threshold definite time (U<< def) U n (step 0.01 U n) U<< def Operating time (t U<< def) s s (step 0.01 s) s (step 0.1 s) Note 1 The setting ranges of the relay nominal voltage U n are dependent on the version (to be selected on purchase), with reference voltages U R 100 V or 400 V. Note 2 When the rated voltage of the electricity network divided by 3 corresponds to the value of rated primary voltage of the sensors (20000 / 3), then the nominal voltage of the relay must be adjusted to Un = 100 V (default setting). Note 3 The 26 element is available when the MPT module is connect on Thybus and enabled Note 4 The mathematical formula for INVERSE curve is: t= (0.75 t U< inv) / [1 - (U/U< inv)] t = operating time (in seconds) t U< inv = operating time setting (in seconds) U = input voltage U< inv = threshold setting 16 NV10P - Manual TECHNICAL DATA

17 Pickup time 0.04 s Dropout ratio Dropout time 0.04 s Overshoot time 0.03 s Pickup accuracy ± 1% ± 1% U n/e n Operate time accuracy 5% or ± 10 ms Undervoltage - 27 for electronic sensor versions Common configuration: Voltage measurement type for 27 (Utype27) 27 Operating logic (Logic27) AND/OR U ph-ph/u ph-n U< Element Element U<< U< Curve type (U< Curve) DEFINITE/INVERSE [1] Definite time 27 First threshold definite time (U< def) U n/e n (step 0.01 U n/e n) U< def Operating time (t U< def) s s (step 0.01 s) s (step 0.1 s) Inverse time 27 First threshold inverse time (U< inv) U n/e n (step 0.01 U n/e n) U< inv Operating time (t U< inv) s s (step 0.01 s) s (step 0.1 s) Definite time 27 Second threshold definite time (U<< def) U n/e n (step 0.01 U n/e n) U<< def Operating time (t U<< def) s s (step 0.01 s) s (step 0.1 s) Pickup time 0.04 s Dropout ratio Dropout time 0.04 s Overshoot time 0.03 s Pickup accuracy ± 1% ± 1% U n/e n Operate time accuracy 5% or ± 10 ms Positive sequence undervoltage - 27V1 for inductive VTs versions U 1< Element Definite time 27V1 First threshold definite time (U 1< def) U n (step 0.01 U n) U 1< def Operating time (t U1< def) s s (step 0.01 s) s (step 0.1 s) Pickup time 0.04 s Dropout ratio Dropout time 0.04 s Overshoot time 0.03 s Pickup accuracy ± 1% ± 1% U n Operate time accuracy 5% o ± 10 ms Positive sequence undervoltage - 27V1 for electronic sensor versions U 1< Element Definite time 27V1 First threshold definite time (U 1< def) E n (step 0.01 E n) U 1< def Operating time (t U1< def) s s (step 0.01 s) s (step 0.1 s) Pickup time 0.04 s Dropout ratio Dropout time 0.04 s Overshoot time 0.03 s Pickup accuracy ± 1% ± 1% E n Operate time accuracy 5% o ± 10 ms Note 1 The mathematical formula for INVERSE curve is: t= (0.75 t U< inv) / [1 - (U/U< inv)] t = operating time (in seconds) t U< inv = operating time setting (in seconds) U = input voltage U< inv = threshold setting TECHNICAL DATA NV10P - Manual

18 Overvoltage - 59 for inductive VTs versions Common configuration: 59 Operating logic (Logic59) AND/OR U> Element U> Curve type (U> Curve) DEFINITE/INVERSE [1] Definite time 59 First threshold definite time (U> def) U n (step 0.01 U n) U> def Operating time (t U> def) s s (step 0.01 s) s (step 0.1 s) Inverse time 59 First threshold inverse time (U> inv) U n (step 0.01 U n) U> inv Operating time (t U> inv) s s (step 0.01 s) s (step 0.1 s) U>> Element Definite time 59 Second threshold definite time (U>> def) U n (step 0.01 U n) U>> def Operating time (t U>> def) s s (step 0.01 s) s (step 0.1 s) Pickup time 0.04 s Dropout ratio Dropout time 0.04 s Overshoot time 0.03 s Pickup accuracy ± 1% ± 1% U n/e n Operate time accuracy 5% or ± 10 ms Overvoltage - 59 for electronic sensor versions Common configuration: Voltage measurement type for 59 (Utype59) U ph-ph/u ph-n 59 Operating logic (Logic59) AND/OR U> Element U> Curve type (U> Curve) DEFINITE/INVERSE [2] Definite time 59 First threshold definite time (U> def) U n/e n (step 0.01 U n/e n) U> def Operating time (t U> def) s s (step 0.01 s) s (step 0.1 s) Inverse time 59 First threshold inverse time (U> inv) U n/e n (step 0.01 U n/e n) U> inv Operating time (t U> inv) s s (step 0.01 s) s (step 0.1 s) U>> Element Definite time 59 Second threshold definite time (U>> def) U n/e n (step 0.01 U n/e n) U>> def Operating time (t U>> def) s s (step 0.01 s) s (step 0.1 s) Pickup time 0.04 s Dropout ratio Dropout time 0.04 s Overshoot time 0.03 s Pickup accuracy ± 1% ± 1% U n/e n Operate time accuracy 5% or ± 10 ms Note 1 The mathematical formula for INVERSE curve is: t = (0.5 t U> inv) / [(U/U> inv) - 1] t = operating time (in seconds) t U> inv = operating time setting (in seconds) U = input voltage U> inv= threshold setting Note 2 The mathematical formula for INVERSE curve is: t = (0.5 t U> inv) / [(U/U> inv) - 1] t = operating time (in seconds) t U> inv = operating time setting (in seconds) U = input voltage U> inv= threshold setting 18 NV10P - Manual TECHNICAL DATA

19 Ten minutes overvoltage - 59Uavg [1] for inductive VTs versions Common configuration: Operating logic (Logic59Uavg) Uavg> Element AND/OR Definite time First threshold definite time (U avg > def) U n (step 0.01 U n) Time delay (t Uavg> def) s (step 1 s) Pickup time according to the reference conditions [2] Pickup accuracy ± 1% ± 1% U n Time delay accuracy [3] 5% ± 3 s Ten minutes overvoltage - 59Uavg [1] for electronic sensor versions Common configuration: Voltage measurement type (Utype59Uavg) Operating logic (Logic59Uavg) Uavg> Element U ph-ph/u ph-n AND/OR Definite time First threshold definite time (U avg > def) U n (step 0.01 U n/e n) Time delay (t Uavg> def) s (step 1 s) Pickup time according to the reference conditions [2] Pickup accuracy ± 1% ± 1% U n/e n Time delay accuracy [3] 5% ± 3 s Residual overvoltage - 59N for inductive VTs versions Common configuration: Residual voltage measurement type for 59N - direct/calculated (3Vo Type59N) U E /U EC Operation from 74VT external (74VText59N) OFF /Block U E> Element U> Curve type (U> Curve) DEFINITE/INVERSE [4] U E> Reset time delay (t UE>RES) s s (step 0.01 s) s (step 0.1 s) Definite time Element U E>> 59N First threshold definite time (U E> def) U E> def Operating time (t UE> def) Inverse time 59N First threshold inverse time (U E> inv) U E> inv Operating time (t UE> inv) U E>> Reset time delay (t UE>>RES) Definite time 59N Second threshold definite time (U E>> def) U E>> def Operating time (t UE>> def) U En (step 0.01 U En) s s (step 0.01 s) s (step 0.1 s) U En (step 0.01 U En) s s (step 0.01 s) s (step 0.1 s) s s (step 0.01 s) s (step 0.1 s) U En (step 0.01 U En) s s (step 0.01 s) s (step 0.1 s) U E>> Reduced Operating time (t cue>> def) s (step 0.01 s) t cue>> Activation time (t atcue>>) s (step 1 s) Pickup time 0.04 s Dropout ratio Dropout time 0.04 s Overshoot time 0.03 s Pickup accuracy ± 1% ± 1% U En Operate time accuracy 5% or ± 10 ms Note 1 The function is based on the measurement of the mean of the three phase voltages of 10 minutes with update every three seconds Note 2 The pickup time depends on the initial and final value of the input voltage; e.g. with a setting of threshold equal to 1.10 Un: - with initial value 0 and final value 1.1 Uavg> def (1.1x1.1 = 1.21 Un) the pickup time is 498 s - with initial value 0.9 Uavg>def (0.9x1.1 = 0.99 Un) and final value 1.1 Uavg>def (1.1x1.1 = 1.21 Un) the pickup time is 285 s Note 3 Since the aggregate value is updated every 3 s, times are only meaningful in multiples of 3 s Note 4 The mathematical formula for INVERSE curve is t= (0.5 t UE> inv) / [(U E/U E> inv) - 1] t = operating time (in seconds) t UE> inv = operating time setting (in seconds) U E = residual input voltage (direct or calculated) U E> inv = threshold setting TECHNICAL DATA NV10P - Manual

20 Residual overvoltage - 59N for electronic sensor versions Common configuration: Residual voltage measurement type for 59N - (3Vo Type59N) U EC Operation from 74VT external (74VText59N) OFF /Block U E> Element U> Curve type (U> Curve) DEFINITE/INVERSE [1] U E> Reset time delay (t UE>RES) s s (step 0.01 s) s (step 0.1 s) Definite time Element U E>> 59N First threshold definite time (U E> def) U E> def Operating time (t UE> def) Inverse time 59N First threshold inverse time (U E> inv) U E> inv Operating time (t UE> inv) U E>> Reset time delay (t UE>>RES) Definite time 59N Second threshold definite time (U E>> def) U E>> def Operating time (t UE>> def) U En (step 0.01 U En) s s (step 0.01 s) s (step 0.1 s) U En (step 0.01 U En) s s (step 0.01 s) s (step 0.1 s) s s (step 0.01 s) s (step 0.1 s) U En (step 0.01 U En) s s (step 0.01 s) s (step 0.1 s) U E>> Reduced Operating time (t cue>> def) s (step 0.01 s) t cue>> Activation time (t atcue>>) s (step 1 s) Pickup time 0.04 s Dropout ratio Dropout time 0.04 s Overshoot time 0.03 s Pickup accuracy ± 1% ± 1% U En Operate time accuracy 5% or ± 10 ms Negative sequence overvoltage - 59V2 for inductive VTs versions U 2> Element Definite time 59V2 First threshold definite time (U 2> def) U n (step 0.01 U n) U 2> def Operating time (t U2> def) s s (step 0.01 s) s (step 0.1 s) Pickup time 0.04 s Dropout ratio Dropout time 0.04 s Overshoot time 0.03 s Pickup accuracy ± 1% ± 1% U n Operate time accuracy 5% or ± 10 ms Negative sequence overvoltage - 59V2 for electronic sensor versions U 2> Element Definite time 59V2 First threshold definite time (U 2> def) U n (step 0.01 E n) U 2> def Operating time (t U2> def) s s (step 0.01 s) s (step 0.1 s) Pickup time 0.04 s Dropout ratio Dropout time 0.04 s Overshoot time 0.03 s Pickup accuracy ± 1% ± 1% E n Operate time accuracy 5% or ± 10 ms Note 1 The mathematical formula for INVERSE curve is t= (0.5 t UE> inv) / [(U E/U E> inv) - 1] t = operating time (in seconds) t UE> inv = operating time setting (in seconds) U E = residual input voltage (calculated), U E> inv = threshold setting 20 NV10P - Manual TECHNICAL DATA

21 Underfrequency (81U) f< Element Definite time 81U First threshold definite time (f< def) f n (step f n) f< def Operating time (t f< def) s s (step 0.01 s) s (step 0.1 s) Voltage control f< Control enable (f<) ON/OFF f< Controlled by U E>> start (f<ue>>) ON/OFF f< Controlled by digital input (f<digin) ON/OFF f< Controlled by U 1< start (f<27v1) ON/OFF f< Controlled by U 2> start (f<59v2) ON/OFF f< Controlled by U< start (f<u<) ON/OFF f< Controlled by network no link (f<rete61850-ko) ON/OFF f< Reset time delay (f<res) s s (step 0.01 s) s (step 0.1 s) f<< Element f<<< Element f<<<< Element Definite time 81U Second threshold definite time (f<< def) f n (step f n) f< def Operating time (t f< def) s s (step 0.01 s) s (step 0.1 s) f<< Reduced Operating time (t cf<< def) s (step 0.01 s) t cf<< Activation time (t atcf<<) s (step 1 s) Definite time 81U Third threshold definite time (f<<< def) f n (step f n) f< def Operating time (t f< def) s s (step 0.01 s) s (step 0.1 s) Definite time 81U Fourth threshold definite time (f<<<< def) f n (step f n) f< def Operating time (t f< def) s s (step 0.01 s) s (step 0.1 s) Pickup time 0.03 s Dropout ratio Dropout time 0.04 s Overshoot time 0.04 s Pickup accuracy ± 20 mhz Operate time accuracy 1.5% ± 10 ms [1] Overfrequency (81O) f> Element Definite time 81O First threshold definite time (f> def) f n (step f n) f> def Operating time (t f> def) s s (step 0.01 s) s (step 0.1 s) Voltage control f> Control enable (f>) ON/OFF f> Controlled by U E>> start (f>ue>>) ON/OFF f> Controlled by digital input (f>digin) ON/OFF f> Controlled by U 1< start (f>27v1) ON/OFF f> Controlled by U 2> start (f>59v2) ON/OFF f> Controlled by U< start (f>u<) ON/OFF f> Controlled by network no link (f>rete61850-ko) ON/OFF f> Reset time delay (f>res) s s (step 0.01 s) s (step 0.1 s) f>> Element Definite time 81O Second threshold definite time (f>> def) f n (step f n) f>> def Operating time (t f>> def) s s (step 0.01 s) s (step 0.1 s) Note 1: 1.5% ± 15 ms with operate time setting = 0.05 s TECHNICAL DATA NV10P - Manual

22 f>> Reduced Operating time (t cf>> def) s (step 0.01 s) t cf>> Activation time (t atcf>>) s (step 1 s) Pickup time 0.03 s Dropout ratio Dropout time 0.04 s Overshoot time 0.04 s Pickup accuracy ± 20 mhz Operate time accuracy 1.5% ± 10 ms [1] Frequency rate of change (81R) df> Element df> Operating mode (Mode-df>) Definite time 81R First threshold definite time (df> def) df> def Operating time (tdf> def) df>> Element df>> Operating mode (Mode-df>>) Definite time 81R Second threshold definite time (df>> def) df>> def Operating time (tdf>> def) Module/Positive/Negative Hz/s (step 0.1 Hz/s) s s (step 0.01 s) s (step 0.1 s) Module/Positive/Negative Hz/s (step 0.1 Hz/s) s s (step 0.01 s) s (step 0.1 s) df>>> Element df>>>> Element df>>> Operating mode (Mode-df>>>) Definite time 81R Third threshold definite time (df>>> def) df>>> def Operating time (tdf>>> def) df>>>> Operating mode (Mode-df>>>>) Definite time 81R Fourth threshold definite time (df>>>> def) df>>>> def Operating time (tdf>>>> def) Pickup time Dropout time Reference values Pickup accuracy Operate time accuracy Module/Positive/Negative Hz/s (step 0.1 Hz/s) s s (step 0.01 s) s (step 0.1 s) Module/Positive/Negative Hz/s (step 0.1 Hz/s) s s (step 0.01 s) s (step 0.1 s) 0.3 s with setting df: Hz/s 0.2 s with setting df: Hz/s 0.1 s with setting df: Hz/s 0.05 s rest 0 df trip 1.5 df ± 20 mhz/s with setting df: Hz/s ± 50 mhz/s with setting df: Hz/s ± 200 mhz/s with setting df: Hz/s 3% ± 20 ms Breaker failure - BF BF Time delay (t BF) s (step 0.01 s) Dropout ratio Dropout time 0.05 s Operate time accuracy 5% or ± 10 ms Note 1: 1.5% ± 15 ms with operate time setting = 0.05 s 22 NV10P - Manual TECHNICAL DATA

23 3.8 CONTROL AND MONITORING Frequency tracking Locking range [1] Rate (instantaneous change) Minimum voltage Hz 5 Hz/s E n Trip Circuit Supervision - 74TCS Operate time: One binary input supervision Two binary inputs supervision Reset time delay: One binary input supervision Two binary inputs supervision 40 s 2 s 6 s 0.6 s Circuit Breaker supervision Circuit breaker diagnostic Number of CB trips threshold (N.Open) (step 1) Circuit Breaker maximum allowed opening time (t break>) s (step 0.01 s) Oscillography (DFR) [2] Format COMTRADE Recording mode circular Sampling rate 24 samples / cycle Trigger setup: Pre-trigger time s (step 0.01 s) Post-trigger time s (step 0.05 s) Set sample channels: u L1, u L2, u L3, u E Set analog channels: Analog 1...Analog 12 Set digital channels: Digital 1...Digital 12 f, U L1, U L2, U L3, U E, U EC, U 1, U 2, df/dt T1...T8 [3] K1... K6, K7...K10, IN1, IN2, IN3...IN42 [4] PLC (Programmable Logic Controller) [5] Reference standard IEC Language [6] IL (Instruction List) Inputs: Binary inputs IN1, IN2 on board IN8...IN10 with MRI module IN11...IN26 with one MID16 module IN27...IN42 with two MID16 modules Delayed binary inputs [7] IN1, IN2 on board IN8...IN10 with MRI module IN11...IN26 with one MID16 module IN27...IN42 with two MID16 modules Start (all elements) Start U<, Start U<<,...etc Trip (all elements) Trip U<, Trip U<<,...etc Measures UL1, UL2,...ecc Temperature Outputs: Relays LEDs Current converter Pt100 K11...K6 on board K7...K10 with MRI module START, TRIP, L1...L6 on board L7...L10 with MRI module DAC Note 1 If the measured frequency is out of the locking range, the system lock on to the rated frequency (50 or 60 Hz) Note 2 For the DFR function a licence is required; call Thytronic for purchasing. Note 3 The measures of temperature are available only when the MPT module on Thybus is enabled (eigth Pt100 inputs) Note 4 Output relay K7...K10 and binary input IN3...IN42 states are available only when the concerning I/O circuits are implemented (MRI and MID16 modules on Thybus) Note 5 For the PLC function a licence is required; call Thytronic for purchasing. Note6 With ThySetter V3.4.3 release and compiler IEC V1.2.7 only the IL language is implemented (Instruction List); other languages, according with IEC standard (ST (Structured Text)), LD (Ladder Diagram), FBD (Function Block Diagram), SFC (Sequential Functional Chart), will be available soon Note 7 The input state is acquired downstream the ton and toff timers TECHNICAL DATA NV10P - Manual

24 3.9 METERING Direct Calculated Medie: Frequency (f ) RMS value of fundamental component of the input voltages (U L1, U L2, U L3) RMS value of fundamental component of the residual voltage (U E) Calculated phase-to-phase voltages (U 12, U 23, U 31) Calculated residual current (U EC) Maximum voltage between U L1-U L2-U L3 (U Lmax) Average voltage between U L1-U L2-U L3 (U L) Tensione media tra U 12, U 23, U 31 (U Lavg) Positive sequence voltage (U 1) Negative sequence voltage (U 2) Third harmonic of residual voltage (U E-3rd) Frequency rate of change (df/dt) Ten minutes voltages (refresh 3 s) (U L1avg, U L2avg, U L3avg) Max voltage between U L1avg, U L2avg, U L3avg (U Lavgmax) Temperature PT1 (T 1) Temperature PT2 (T 2) Temperature PT3 (T 3) Temperature PT4 (T 4) Temperature PT5 (T 5) Temperature PT6 (T 6) Temperature PT7 (T 7) Temperature PT8 (T 8) Note 1 The measures of temperature are available only when the MPT module on Thybus is enabled (eight Pt100 inputs) 24 NV10P - Manual TECHNICAL DATA

25 4.1 HARDWARE DESCRIPTION 4 FUNCTION N CHARACTERISTICS A C R T I C S The following figure illustrates the basic structure of the relay. MMI LEDs LCD RS232 ETHERNET RS485 INPUT MODULE Thybus EEprom Flash SRam CPU EEprom DUAL PORT SRam DSP CTs - VTs V-Sensor RTC CPU BOARD +5 V +10 V -10 V +24 V 0 V RESET POWER FAIL POWER SUPPLY BINARY INPUTS IN1 IN2 Input Uaux RELAYS K1...K6 Output contacts POWER SUPPLY BOARD hw.ai Printed boards hold the circuit components arranged according to a modular allocation of the main functions. CHARACTERISTICS NV10P - Manual

26 Power supply board All the components necessary for conversion and stabilization functions are present. Two versions are envisaged suited to the input ranges V and V. The circuit provides stabilized voltages of +10 V and -10 V, required for the analogue measurement, +24V for relays and +5 V for supplying the digital circuits. The circuit board additionally comprises: Two binary input circuits, with photo-couplers which provide for galvanic separation. Six output relays (k1...k6). CPU board Input board This circuit board contains all the circuits necessary for performing the analogue and digital processing of the signals. Analog processing The following are envisaged: Anti aliasing filter circuits, Amplifier circuits for conditioning the input signals, Reference voltage adjustment circuits for the measurement A/D converter. The Pro-n relays use a DSP processor operating at 40 MHz; it performs all the processing on the analogue signals and furthermore coordinates management of the TX-RX signals to the CPU. The input currents are sampled at a frequency of 24 samples per period by means of a dual conversion system which allows the attainment of information pertaining to polarity and amplitude with high resolution. The measurement criterion allows precise measurement of even those signals having a unidirectional component, such as transient currents with overlapping exponential, which typically appear during faults. The circuit board also houses the output relays with the corresponding command and control circuits, communication circuits, buttons, LCD display, LEDs and the key switch. CPU A 32 bit CPU is provided. The following are envisaged: Real Time Clock circuits with oscillator and super capacitor, RS232 communication port, RS485 communication port, Thybus communication circuits for external modules and MMI board, Network communication circuits (optional Ethernet). Memories: SRam: high speed static memory, used for data and cache, Flash memory: used for fw storage and upgrade, EEprom memory: used for calibration data storage, Dual port Ram for data transfer between CPU and DSP. Three VTs committed for phase voltages acquisition, One VT committed for residual voltage acquisition. MMI (keyboard, LED and display) The MMI module (Man Machine Interface) includes: An eight keys 8 keyboard, a backlight LCD display, Eight signalling LEDs, The removable plug allows separation of the MMI module for free access to the CPU board when DIP-switch setting is required. 26 NV10P - Manual CHARACTERISTICS

27 4.2 SOFTWARE DESCRIPTION The program which handles operation of the Pro-N relays is made up of three fundamental elements shown in the following block diagram. Ethernet RS485 RS232 TIMER I/O boards RTOS timer RTOS timer KEYS RTC refresh PC com Sync + RTOS timer EEPROM update Messages Binary inputs RAM/EPROM memory check Diagnostic Output relays Data Base DATA BASE LEDs Thybus I/O Counters Fast devices Events EEPROM sampling Measures MMI Slow devices DSP Oscillography RTOS timer KEYS SIMBOLOGIA task Processo (task) Drivers RTOS timer Libreria funzionale (Drivers) Timer del sistema operativo Interrupt sw.ai Base software Real-time operating system Task Single modules are application independent with modular and scalable structure. The system can be assimilated to the PC BIOS (Basic Input-Output System); three main function are provided: Start-up test execution; RAM loading of the operating system; Provide a suitable interface to access the relay hardware. An embedded operative system is employed suitable for real-time applications (RTOS). A multithread preemptive structure is able to menage several task with multiple priority levels. The kernel represents the nucleus of the system: it includes the processing functions closest to the electronic circuits. In addition, the kernel manages a service communication protocol known as Basic Protocol (BP). The task (process e thread) are the base components. Example are: Keyboard management RTC (Real Time Clock) updating RAM/EEPROM updating Diagnostic Input acquisition Output relay management MMI I/O updating DSP data processing CHARACTERISTICS NV10P - Manual

28 DSP Firmware By means of Discrete Fourier Transform calculation, based on 24 samples/period, information is deduced in relation to the amplitude and phase of all the current measurements; these are constantly updated and at the disposal of all the protection and control application algorithms. Drivers Application Software Inside the driver library, all the specialized module for protection and control function are provided. They are the link from kernel and application layer. Examples are: Data base management PC messages management TCP/IP messages management Basic Protocol management Counter management Event and fault management Measuring management Oscillography management The software acts the specialization of the base system; all protective and control elements are inside it. The main modules ate: Diagnostic function for application layer, Input management (binary inputs), Protective functions, Event recording, Output management (LEDs and relays) Each element (Kernel, Drivers and Application) may, in turn, be split into modules: Base protocol (kernel) The module known as the Basic Protocol (BP) manages the service communication between the kernel and the other modules through the communication buses with the following services: Data and information exchange, Calibration, Upgrade fw DSP, Upgrade application sw Communication (drivers) The ModBus TCP/IP protocol, with ethernet interface, the ModBus RTU, IEC and DNP3 protocol over RS485 interface and the ModBus RTU RS232 for ThySetter are provided. MMI (drivers) The drivers deal with the menu management (MMi and/or communication messages). Data Base Self test (Application) Development tools (Builder) The data base is split into three main sections: RAM for volatile data, REE and PAR for non volatile data. The main hw and sw function are permanently verified in background; no additional delay are introduced. In particular the following function are tested: Reference voltages; Output relays; Sw flow with execution time monitoring; REE and PAR data congruence. For the development of the project, a CASE instrument has been developed, responsible for the optimized production of software code for the management of collaboration, the database and the MMI data and the Xml files used for communication. The automatic code generation criteria ensures the quality of the result in terms of the reusability, verifiability and maintainability of the software life cycle. 28 NV10P - Manual CHARACTERISTICS

29 4.3 I/O DESCRIPTION Metering inputs VTs versions The following inputs are provided: Three phase voltage inputs with programmable nominal voltages within range V (U R=100 V) or V (U R=400 V) to be select on order. The nominal voltages is user adjustable inside a wide setting range, so the relays can be employed on plants with TV different secondary voltages ( V for versions with U R=100 V and V for versions with U R=400 V). The version with U R=400 V allows a direct measure without interposing VTs for low voltage applications ( V nominal voltage). One residual voltage input, with programmable nominal voltage within range V (U ER=100 V); NV10P 1 residual voltage input 3 line voltage inputs sensori-en.ai Electronic sensor versions Three voltmetric inputs are provided; the phase voltages U L1, U L2, U L are measured, and the phase-tophase voltages U 12, U 23, U 31 and the residual voltage U EC are calculated. NV10P 3 phase voltage inputs V-sensor1.ai Signal processing Various processing levels are involved: Acquisition (base level). Direct measures of physical channels (first level). Calculated measures (second level). Derived (third level). The measures concerning a level are based on data worked out in the previous level. For each level the required resources concerning the priority for tasks (conditioning circuits, DSP and CPU) are on hand. ACQUISITION (base level) The input signals are sampled 24 times per period: ACQUISITION INSTANTANEOUS MEASURES - u L1...u L3 Input voltage instantaneous values - u E Residual voltage instantaneous value From the sampled quantities, several measures are computed for protection, monitoring and metering purposes. Direct Calculated acquisizione-en.ai CHARACTERISTICS NV10P - Manual

30 Direct Frequency. The measure of period is taken from voltage inputs. VT ACQUISITION U L1 u L1 U L2 u L2 T f (Hz) U L3 u L3 Samples are processed by means DFT (Discrete Fourier Transform) algorithm and the phase and amplitude of fundamental are computed: Input voltages U L1, U L2, U L3 F.ai TV ACQUISITION u L1, u L2, u L3 DFT U L1, U L2, U L3 (E n) UL1-en.ai Residual voltage U E TV ACQUISITION Calculated By means vector addition of direct measures the following are calculated (RMS value of fundamental components): Calculated residual voltage U EC u E DFT (fundamental) DFT (3rd harmonic) U E U E3H (U En) (U En) UE-en.ai U L1 U L2 U EC = U L1 + U L2 + U L3 U EC (U En) U L3 UEC.ai Negative sequence voltage: U 2 U L1 U 2 U2.ai U L2 U L3 U 2 = (U L1+ e -j120 U L2+ e +j120 U L3) (u n) e -j = - - j e +j = - + j NV10P - Manual CHARACTERISTICS

31 Ten minutes RMS voltage From the values of phase voltages U L1, U L2, U L3 (versions with electronic sensors) or U 12, U 23, U 31 (versions with inductive VTs), the RMS voltage is calculated by aggregating 10 minutes of: The RMS voltages are acquired every 0.2 seconds; Separately for each phase, the acquired values are aggregated to 10 minutes (600 s) performing the square root of the arithmetic mean of the last 600/0, 2 = 3000 values squared. The aggregation of 10 minutes is updated every 3 s. U m = (Ui) i=1 In response to a step change of the input voltage U (with voltage initially already stabilized), the voltage U m has a transitional trend with square-law as shown in the following figure. 1.3 U Um Ten minutes RMS voltage (59Uavg) Conventions Phase rotation direction The conventional rotation direction for the voltage phasors is counter-clockwise. fasori.ai Cyclic phase sequence order For three phase rotating voltages, a direct cyclic sequence is defined when the three phases are L1, L2, L3 ordered, while an inverse cyclic sequence is defined when the three phases are L1, L3, L2 ordered. U L1 U L1 U L3 U L2 Direct sequence cyclic order U L2 U L3 Inverse sequence cyclic order fasori1.ai CHARACTERISTICS NV10P - Manual

32 Use of measured values Usage of measured values for protection, control and monitoring. f ul1, ul2, ul3 UL1, UL2, UL3 U12, U23, U31 ue UE U1 U2 UEC Temperature Binary input IN1, IN2 Output Relay K1...K6 Start LED L1...L5 Trip LED L1...L5 Logic block (Block1) Breaker failure (BF) PROTECTION Thermal Pt100 probes (26) g g g g Undervoltage - 27 g g g g g g g Positive sequence undervoltage (27V1) g Overvoltage - 59 g g g g g g g Negative sequence overvoltage (59V2) g Residual overvoltage - 59N g g g g g g g Average voltage (59Uavg) Underfrequency - 81U g g g g g g Overfrequency - 81O g g g g g g Frequency rate of change - 81R g g g g g g Breaker failure - BF g g g g g CONTROL MONITORING Trip Circuit Supervision (TCS) Logic block (Block1) g g Frequency tracking (IF) g g g g Self Automatic reclosure (ARF) g g g g g EVENT RECORDING (SER) Event 0 g g g g Event 1 g g g g Event 2 g g g g Event... g g g g Event 299 g g g g FAULT RECORDING (SFR) Fault 0 g g g g g g Fault 1 g g g g g g Fault 2 g g g g g g Fault... g g g g g g Fault 19 g g g g g g DIGITAL FAULT RECORDER (OSCILLOGRAPHY) Record 1 g g g g Record 2 g g g g Record 3 g g g g Record... g g g g 32 NV10P - Manual CHARACTERISTICS

33 Binary inputs Two binary inputs are available. The dry inputs must be powered with an external voltage, (usually the auxiliary power supply). The connections are shown in the schematic diagrams. The following settings can be used to configure each input: Logic Active-ON (activated when powered), or Active-OFF (activated when power is turned off). ON Timer (OFF-to-ON time delay) and OFF Timer (ON-to-OFF time delay). Binary input allocation. Adjustable debounce timer allows any transient to decay avoiding false activation of the input; the positive transition is acquired if the input is permanently high for a time interval longer than the t ON setting delay; similarly for the negative transitions, the negative transition is acquired if the input is permanently high for a time interval longer than the t OFF setting delay. BINARY INPUT t ON t ON t OFF t OFF INTERNAL STATE t binary-timers.ai In the above shown diagram, INTERNAL STATE represents the logical state of the binary input used in the following processing. Each binary input may be matched to one of the following default functions. FUNCTIONS Binary inputs IN1 IN2 Reset LEDs g g Set profile (switching setting A and B) g g Fault trigger (fault recording) g g Block1 (logic block) g g TCS1 (Trip Circuit Supervision) g g TCS2 (Trip Circuit Supervision) g g Trip ProtExt (trip from external protection relays) g g Reset counters g g Reset CB Monitor (clear CB monitoring data) g g 52a (CB auxiliary contact) g g 52b (CB auxiliary contact) g g Open CB g g Close CB g g Remote trip g g 74VT ext. (74VT from external protection relays) g g f<-f> Control g g CHARACTERISTICS NV10P - Manual

34 Reset LEDs If the element tripped have gone back to rest condition, the latched LEDs and/or relays may be cleared. Reset LEDs Set (ON turn on LED/relay) Logic INx t ON INx t OF F n.c. INx t ON INx t OFF Reset (ON turn off LED/relay) n.o. T 0 0 T Binary input INx (x=1, 2) Set-Reset latch S R TRIPPING MATRIX (LED+RELAYS) Binary input allocation for reset signalling (LEDs) Reset-led.ai Set profile Inside PRO-N devices, two independent setting profiles (A and B) are available. Whereas different settings are required, they are made in the setting profiles and stored in the non volatile memory of relay. Applicable setting profile is activated usually via a binary input; when the programmed input is activated, the profile B becomes operative as a replacement for the default profile A. [1] Profile B Profile A Profile B Profile A Profile selection (A, B, from binary input) Set profile Logic INx t ON INx t OF F n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx (x=1, 2) OFF Profile A, ON Profile B Binary input allocation for switching of setting profiles TCS1 and TCS2 Trip Circuit Supervision. Supervision with one or two binary input can be performed. The exhaustive treatment of the TCS function is described in the concerning paragraph. Switch-profile.ai +UAUX TCS1 Logic IN1 t ON IN1 t OF F TRIP n.c. n.o. IN1 t ON IN1 t OFF T 0 0 Binary input IN1 74TCS logic TCS2 Logic IN1 t ON IN1 t OF F 52 52a 52b n.c. n.o. IN1 t ON IN1 t OFF T 0 0 Binary input IN1 74TCS logic -UAUX Trip Circuit Supervision - 74TCS with two binary inputs TCS2.ai Fault trigger When the programmed input is activated, a trigger is issued for fault record SFR). Data storing takes place with the same procedure resulting from a trip of any protective elements. Fault recording Fault trigger Logic n.c. n.o. INx t ON INx t OF F INx t ON INx t OFF T 0 0 T Binary input INx (x=1,2) Protection element 1 U L1->U L1r U L2->U L2r... Inputs Outputs Fault cause info Binary input allocation for fault recorder trigger Note 1 To enable the profile switching the Input-selected parameter must be set inside the Profile selection submenu. If multiple setting groups are not required, Group A is the default selection 34 NV10P - Manual CHARACTERISTICS

35 Block1 A change in status of a binary input effects a block for a length of time equal to the activation of the input[1]; the element pickup that wish be blocked must be enabled (the Block1 parameter must be set to ON in the concerning menu). [2] The application of the IN1 binary input for the acquisition of the Block1 (logic block) coming from external signal is shown in the following figure; in the example the block signal is ORed with Block2 (selective block) to block the generic (xxx) element. Block1 Enable (ON Enable) Blocking xxxx Block1 Block1 Logic IN1 t ON IN1 t OF F n.c. n.o. IN1 t ON IN1 t OFF T 0 0 T Binary input IN1 Block1 input (ON Block) Block1 Binary input allocation for logic block (Block1) Block1.ai Trip ProtExt The binary input detects a trip coming from an external protective relay: the information is available for the breaker failure function (BF). +UAUX -UAUX Trip ProtExt IN+ IN- Reset counters A change in status of a binary input effects a reset of all start/trip partial counters. [3] Reset CB Monitor A change in status of a binary input effects a reset of all counters concerning the circuit breaker diagnostic: CB Open counter 52a-52b The CB position can be acquired by means of binary inputs connected to the auxiliary contacts: the information is used in the following functions: Logic n.c. n.o. IN1 t ON IN1 t OF F IN1 t ON IN1 t OFF T 0 0 T Binary input IN1 Binary input allocation for trip acquisition from external protection device CB position (open-closed) CB diagnostic (N. of operations, trip time) Breaker Failure (BF). Breaker failure (BF) ExtProt.ai +UAUX 52 52a -UAUX 52b 52a IN+ IN- 52b IN+ IN- Logic n.c. n.o. Logic n.c. n.o. IN1 t ON IN1 t OF F IN1 t ON IN1 t OFF T 0 0 T Binary input IN1 IN2 t ON IN2 t OF F IN2 t ON IN2 t OFF T 0 0 T Binary input IN2 CB position CB diagnostic Breaker failure (BF) Binary input allocation for CB state acquisition CB-pos.ai Note 1 The Block1 (logic block) keeps block of the protection for the whole time when the input is active. Note 2 The activation of one binary input produces indiscriminately a block of all protective elements programmed for being blocked from Block1 Note 3 The reset of the total counters is practicable by means ThySetter command with Session Level 1 (available with password) CHARACTERISTICS NV10P - Manual

36 Open CB Close CB The external acquisition of remote commands allows to drive CB remotely. +UAUX OPEN command CLOSE command -UAUX Open CB IN+ IN- Close CB IN+ IN- Logic n.c. n.o. Logic n.c. n.o. IN1 t ON IN1 t OF F IN1 t ON IN1 t OFF T 0 0 T Binary input IN1 IN2 t ON IN2 t OF F IN2 t ON IN2 t OFF T 0 0 T Binary input IN2 TRIPPING MATRIX (LED+RELAYS) +UAUX 52 52a 52b O -UAUX I -UAUX Binary input allocation for CB remote driving Remote trip The input activation drives an expressly programmed output relay.. CB-com.ai +UAUX Remote trip Binary input allocation for remote trip -UAUX Remote trip Logic n.c. n.o. IN1 t ON IN1 t OF F IN1 t ON IN1 t OFF T 0 0 T Binary input IN1, IN2 Remote-trip.ai 74TV ext The external acquisition of 74TV allows to block or to change the operating mode of protective elements where the residual voltage is employed; the information is available for residual voltage protective elements (59N protections) that may operate inadvertently when an event cause a loss of one or more voltages. f<-f> Control While the second threshold of each frequency protection is always active, the first threshold is activated / deactivated, respectively, in the absence / presence of the signal integrity of the communication network (from digital input set with inverted logic function and Consent f <f-> or by communication interface with IEC protocol). TRIPPING MATRIX (LED+RELAYS) f> def f f> def f>digin t f>def t f>def T 0 Consenso f<-f> Logic n.c. n.o. INx t ON INx t OF F INx t ON INx t OFF T 0 0 Binary input INx f< def f < f< def f<digin t f<def t f<def T 0 Restrictive threshold enabling from binary input Consenso 81O-81U.ai 36 NV10P - Manual CHARACTERISTICS

37 Output relays Six output relays are available (K1...K6):: [1] K1 and K2 have two changeover contacts (SPDT, type C). K3, K4 and K5 have one make contact (SPST-NO, type A). [2] K6 has one break contact (SPST-NC, type B). [3] Each output relay may be programmed with following operating mode: Operation MODE (No latched, Pulse, Latched). Logic (Energized/De-energized). To each output relay a programmable timer is matched (Minimum pulse width parameter). All parameters are available inside the Set\Relays menu. Input No-latched operation t TR Minimum pulse width Latched operation Pulse operation Output relay operation t TR Minimum pulse width t Relay-operation-timers.ai Any change to the settings can be affected at any time, also with the relay on duty, separately for each relay. Notes: When de-energized operating mode is set, the relay remains in rest condition if no trip command is in progress. When energized operating mode is set, the relay remains in operating condition if no trip command is in progress and the auxiliary supply is powered on. When no-latched operating mode is set (Operation MODE No latched), the output relay reset at the end of the trip condition. To each output relay a programmable timer is matched (minimum pulse width operation). When latched operating mode is set (Operation MODE Latched), the output relay doesn t reset at the end of the trip condition; it stays ON until a reset command is issued (RESET key, ThySetter or communication command). When pulse operating mode is set (Operation MODE Pulse), the output relay reset after a t TR programmable delay regardless of the trip condition. It is advisable to make sure that the output contact technical data are suitable for load (Nominal current, breaking capacity, make current, switching voltage,...). Matching every output relay to any protective element is freely programmable inside the Setpoints submenus according a tripping matrix structure. [4][5] Note 1 Schematic diagram are shown inside APPENDIX B1. Note 2 K3 and K4 have a common terminal (A10) Note 3 K5 and K6 have a common terminal (A13) Note 4 Matching of the output relay to the protective and control functions can be defined so that any collision from other function is avoided. All output relay are unassigned in the default setting. Note 5 Self test relay: it is advisable to plan the following settings: - Energized operating mode, - No-latched, in order that it stays ON for normal conditions and the other way round it goes OFF if any fault is detected and/or the auxiliary supply turns OFF. CHARACTERISTICS NV10P - Manual

38 FUNCTION RELAYS K1 K2 K3 K4 K5 K6 Self-test relay g g g g g g U< Start relays (U< ST-K) g g g g g g U< Trip relays (U< TR-K) g g g g g g U<< Start relays (U<< ST-K) g g g g g g U<< Trip relays (U<< TR-K) g g g g g g 27V1 Start relays (U1<ST-K) g g g g g g 27V1 Trip relays (U1< TR-K) g g g g g g U> Start relays (U> ST-K) g g g g g g U> Trip relays (U> TR-K) g g g g g g U>> Start relays (U>> ST-K) g g g g g g U>> Trip relays (U>>TR-K) g g g g g g 59Uavg Start relays (Uavg> ST-K) g g g g g g 59Uavg Trip relays (Uavg> TR-K) g g g g g g UE> Start relays (UE> ST-K) g g g g g g UE> Trip relays (UE> TR-K) g g g g g g UE>> Start relays (UE>> ST-K) g g g g g g UE>> Trip relays (UE>>TR-K) g g g g g g 59UV2 Start relays (U2> ST-K) g g g g g g 59UV2 Trip relays (U2> TR-K) g g g g g g f> Start relays (f>st-k) g g g g g g f> Trip relays (f>tr-k) g g g g g g f>> Start relays (f>>st-k) g g g g g g f>> Trip relays (f>>tr-k) g g g g g g f< Trip relays (f<st-k) g g g g g g f< Trip relays (f<tr-k) g g g g g g f<< Start relays (f<<st-k) g g g g g g f<< Trip relays (f<<tr-k) g g g g g g f<<< Start relays (f<<<st-k) g g g g g g f<<< Trip relays (f<<<tr-k) g g g g g g f<<<< Start relays (f<<<<st-k) g g g g g g f<<<< Trip relays (f<<<<tr-k) g g g g g g df> Start relays (df>st-k) g g g g g g df> Trip relays (df>tr-k) g g g g g g df>> Start relays (df>>st-k) g g g g g g df>> Trip relays (df>>tr-k) g g g g g g df>>> Start relays (df>>>st-k) g g g g g g df>>> Trip relays (df>>>tr-k) g g g g g g df>>>> Start relays (df>>>>st-k) g g g g g g df>>>> Trip relays (df>>>>tr-k) g g g g g g 74TCS Start relays (74TCS-ST-K) g g g g g g 74TCS Trip relays (74TCS-TR-K) g g g g g g BF Start relays (BF-ST-K) g g g g g g BF Trip relays (BF-TR-K) g g g g g g Number of CB trips diagnostic relays (N.Open-K) g g g g g g Circuit breaker opening time diagnostic relays (tbreak-k) g g g g g g Open CB command relays (CBopen-K) g g g g g g Close CB command relays (CBclose-K) g g g g g g Remote tripping relays (RemTrip-K) g g g g g g 38 NV10P - Manual CHARACTERISTICS

39 LED indicators Eight LEDs are available. One green LED ON : if turned on it means that the device is properly working, if flashing the internal self-test function has detected an anomaly. One yellow LED START tagged for START of one or more protective elements. [1] One red LED TRIP tagged for TRIP of one or more protective elements. [1] Five red LEDs for highlight the activation of one or more user defined function. Each output relay may be programmed with following operating mode: No-latched: the LED reset at the end of the trip condition. Latched: the LED doesn t reset at the end of the trip condition; it stays ON until a manual reset command is issued (RESET key, ThySetter or communication command). Any change to the settings can be affected at any time, also with the relay on duty, separately for each LED Programming and/or configuration changes can be carried out at any time, separately for each LED by setting the parameters inside the Set\Led menu. LEDs Free allocation of each LED may be set according to the matrix structure shown in the following page. [2] Note 1 The START and the TRIP LED are user assignable to any function; other than starting and tripping information can be assigned to them too, just the same for L1...L5 Note 2 All LEDs are unassigned in the default setting. CHARACTERISTICS NV10P - Manual

40 FUNCTIONS LED START TRIP U< Start LEDs (U< ST-L) g g g g g g g U< Trip LEDs (U< TR-L) g g g g g g g U<< Start LEDs (U<< ST-L) g g g g g g g U<< Trip LEDs (U<< TR-L) g g g g g g g 27V1 Start LEDs (U1<ST-L) g g g g g g g 27V1 Trip LEDs (U1<TR-L) g g g g g g g U> Start LEDs (U> ST-L) g g g g g g g U> Trip LEDs (U> TR-L) g g g g g g g U>> Start LEDs (U>> ST-L) g g g g g g g U>> Trip LEDs (U>>TR-L) g g g g g g g 59Uavg Start LEDs (Uavg> ST-L) g g g g g g g 59Uavg Trip LEDs (Uavg> TR-L) g g g g g g g UE> Start LEDs (UE> ST-L) g g g g g g g UE> Trip LEDs (UE> TR-L) g g g g g g g UE>> Start LEDs (UE>> ST-L) g g g g g g g UE>> Trip LEDs (UE>>TR-L) g g g g g g g 59V2 Start LEDs (U2> ST-L) g g g g g g g I59V2 Trip LEDs (U2> TR-L) g g g g g g g f> Start LEDs (f>st-l) g g g g g g g f> Trip LEDs (f>tr-l) g g g g g g g f>> Start LEDs (f>>st-l) g g g g g g g f>> Trip LEDs (f>>tr-l) g g g g g g g f< Start LEDs (f<st-l) g g g g g g g f< Trip LEDs (f<tr-l) g g g g g g g f<< Start LEDs (f<<st-l) g g g g g g g f<< Trip LEDs (f<<tr-l) g g g g g g g f<<< Start LEDs (f<<<st-l) g g g g g g g f<<< Trip LEDs (f<<<tr-l) g g g g g g g f<<<< Start LEDs (f<<<<st-l) g g g g g g g f<<<< Trip LEDs (f<<<<tr-l) g g g g g g g df> Start LEDs (df>st-l) g g g g g g g df> Trip LEDs (df>tr-l) g g g g g g g df>> Start LEDs (df>>st-l) g g g g g g g df>> Trip LEDs (df>>tr-l) g g g g g g g df>>> Start LEDs (df>>>st-l) g g g g g g g df>>> Trip LEDs (df>>>tr-l) g g g g g g g df>>>> Start LEDs (df>>>>st-l) g g g g g g g df>>>> Trip LEDs (df>>>>tr-l) g g g g g g g 74TCS Start LEDs (74TCS-ST-L) g g g g g g g 74TCS Trip LEDs (74TCS-TR-L) g g g g g g g BF Start LEDs (BF-ST-L) g g g g g g g BF Trip LEDs (BF-TR-L) g g g g g g g Number of CB trips diagnostic LEDs (N.Open-L) g g g g g g g Circuit breaker opening time diagnostic LEDs (tbreak-l) g g g g g g g Open CB command LEDs (CBopen-L) g g g g g g g Close CB command LEDs (CBclose-L) g g g g g g g Remote tripping LEDs (RemTrip-L) g g g g g g g 40 NV10P - Manual CHARACTERISTICS

41 Communication interfaces Several communication ports are provided: RS232 port on the front side of the NV10 device for local communication (ThySetter). RS485 port on the rear side of the NV10 device for bus communication. Ethernet port on the rear side of the NV10 device for bus communication. RS232 A simple DIN to RJ adapter can be used; the L10041 cable can be supplied. The RS232 port has high priority compared with the Ethernet port. RJ10 Connector Pin Female connector (solder side) L RXD 7 3 TXD 8 4 DTR 9 5 GND serial-sch.ai If RS232 port is not available on Personal Computer, an USB-RS232 converter must be employed. [1] The serial port is the simplest access for setting by means the ThySetter software. RS485 Several protocol are implemented [2] : ModBus RTU. Modbus is a serial communications protocol. It is a de facto standard communications protocol in industry, and is now the most commonly available means of connecting industrial electronic devices also inside electric utilities and substation. IEC The IEC suite of protocol is used for communications from master station to substation, as well within the substation; the IEC (Protection equipment) is available together the Modbus protocol on some version of Pro-n devices (code NVxx#xxxxC x). Ethernet It is provided (optionally) a communication board useful for Ethernet communication with ModBus TCP/IP protocol. [3] Modbus/TCP basically embeds a Modbus frame into a TCP frame in a simple manner. This is a connection-oriented transaction which means every query expects a response. This query/response technique fits well with the master/slave nature of ModBus, adding to the deterministic advantage that Switched Ethernet offers industrial users. In the same way as the RS485 base Modbus, every device is identified by a personal address and the communication goes in client-server mode with answering request from the recipient. The protective relay can be directly connect to the Ethernet network (no gateway, protocol converter are needed). Two port can be implemented: 100BASE-TX with RJ45 connector (copper). 100BASE-FX with FX connector (optical fiber) [2] For both modules no hw preset are required. RJ45 Ethernet+RS485 ports RS RX RX+ 2 TX- 1 TX+ F1 F2 F3 B- F4 A+ F5 FX Ethernet (no RS485 port) RX TX Two LEDs are on board (RJ45): LINK - (green): The LED lights up if the connection is active. TX - (yellow): The LED lights up when data transmission is active. ethernet-sch.ai Note 1 After installation, the same communication port must be selected to define the Thysetter parameters (typically COM4, COM5,...). Note 2 The RS485 port is not implemented on the Pro-N devices endowed with Ethernet FX port Note 3 Information about the ModBus map may be find inside the Remote programming manual CHARACTERISTICS NV10P - Manual

42 4.4 PROTECTIVE ELEMENTS Rated values Inside the Base menu the following parameters may be set: Relay reference name. Relay nominal voltages (phase and residual), to which the regulation are related. Primary nominal values, employed for measures relative to primary values. Measurements reading mode. Information for settings: Relay reference name. Alphanumeric mnemonic string (max 16 characters) useful for identification of protected plant. Relay nominal frequency f n This nominal value must be set same as the frequency of the grid. Example: grid frequency f n = 50 Hz Relay nominal frequency f n = 50 Hz Inductive VTs versions Relay nominal voltage U n Two reference voltage are available: U R = 100 V and U R = 400V The U n relay nominal voltage must be set to the value of relay input voltages at grid nominal voltage. The U n value must calculated as: Example 1 Grid nominal voltage U ng where the VTs are included [V] U n = Voltage transformer ratio K TV If VTs with primary nominal voltage is equal to the grid voltage divided by 3, the following streamlined calculus may be used: U n = VTs secondary nominal voltage [V] x 3 L1 L2 L3 U ng = 6.0 kv A N 6000 / K TV = / 3 V = 60 V n NV10P a B1 B2 B3 B4 B5 B6 U L1 U L2 U L3 VOLTAGE INPUTS Phase to ground VTs connection Es1-Un.ai The relay nominal voltage may be set to: U n = U ng / 3 K TV = 6000 / 3 60 = 100 / 3 = 58 V 42 NV10P - Manual CHARACTERISTICS

43 Example 2 L1 L2 L3 A N U ng = 6.0 kv 6000 / 3 V K TV = = / 3 V n NV10P a B1 B2 B3 B4 B5 B6 U L1 U L2 U L3 VOLTAGE INPUTS Phase to phase VTs connection Es2-Un.ai Example 3 The relay nominal voltage may be set to: U n = U ng /K TV = 6000 / 60 = 100 V L1 L2 L3 U ng = 6.0 kv A N N A 6000 V K TV = = V a n n a NV10P B1 B2 B3 B4 B5 B6 U L1 U L2 U L3 VOLTAGE INPUTS Two VTs connection Es3-Un.ai Example 4 The relay nominal voltage may be set to: U n = U ng /K TV = 6000 / 60 = 100 V L1 L2 L3 U ng = 400 V NV10P B1 B2 B3 B4 B5 B6 U L1 U L2 U L3 VOLTAGE INPUTS Es4-Un.ai CHARACTERISTICS The relay nominal voltage may be set to: U n = U ng = 400 V NV10P - Manual

44 Case A Relay residual nominal voltage U En Three instances are expected: A) residual voltage acquired with open delta VT. B) residual voltage measure by means VT connected from star-point and earth. C) residual voltage measure by vector calculus. The residual nominal voltage U En may be estimated by means of the following general formula (effective for insulated neutral or impedance-ground connected grids): Grid nominal voltage U ng where the VTs [V] x 3 are connected U En = VT ratio K VT / Example A1 If open delta VT with primary nominal voltage balances to the grid voltage divided by 3, the following streamlined calculus may be used: U En = 3 VT open delta secondary nominal voltage [V] for insulated or impedance-ground neutral grids. U ng = 6.9 kv Insulated or impedance-ground neutral / 3 K VT = 100 / 3 V = 100 V 3 NV10P U En Grid nominal voltage U ng = 6.9 kv / VT ratio: K VT = / 3 V = / 3 V 3 Es1-UEn.ai Example A2 The relay residual nominal voltage U En must be estimated by means of the following general formula: U En = 3 U ng /K VT = / ( 3 100) = 69 V U np = 6 kv Insulated or impedance-ground neutral 52 K VT = 6000 / 3 V = / 3 V 3 NV10P U En Grid nominal voltage U ng = 6 kv 6000 / 3 V / VT ratio: K VT = = / 3 V Es2-UEn.ai The relay residual nominal voltage U En must be indifferently estimated by means of the following general formula: U En = 3 U ng /K VT = / ( 3 60) = 100 V or by means the following: U En = 3 U ns = / 3 = 100 V 3 Case B The relay residual nominal voltage U En must be estimated by means of the following general formula: Grid nominal voltage U ng where the VTs are included [V] / 3 U En = Voltage transformer ratio K TV If a VT with primary nominal voltage equal to the grid voltage divided by 3 is connected from star neutral to ground, the following streamlined calculus may be used: U En = VT secondary nominal voltage [V] 44 NV10P - Manual CHARACTERISTICS

45 Example B1 U ng = 10 kv EsB1-UEn.ai NV10P / 3 V K VT = = 110 / 100 V 3 U En Grid nominal voltage U ng = 10 kv Ratio of VT connected from star neutral to ground: / 3 V K VT = = 110 / 100 V 3 The relay residual nominal voltage U En may be estimated by means of the following general formula: U En = (U ng / 3) /K VT = (10000 / 3) / (110/ 3) = 91 V Example B2 U ng = 6 kv EsB2-UEn.ai NV10P 6000 / 3 V K VT = = 60 / 100 V 3 U En Grid nominal voltage U ng = 6kV Ratio of VT connected from star neutral to ground: 6000 / 3 V K VT = = 60 / 100 V 3 Case C The relay residual nominal voltage U En may be estimated by means of the following general formula: U En = (U ng / 3) /K VT = (6000 / 3) / (60/ 3) = 100 V The relay residual calculated nominal voltage U ECn is estimated automatically by means of the formula: U ECn = 3 U n Example C1 U ng = 6 kv / K VT = / 3 V = 60 V NV10P U n, U ECn Grid nominal voltage U ng = 6 kv Ratio of line VTs K VT = U np /U ns = 6000 / / 3 V = 60 V Es4-UEn.ai According with the example 2 where U En = 100 V the relay residual calculated nominal voltage U ECn is calculated inside the relay as: U ECn = U n 3 = = 173 V VTs Phase primary voltage U np (phase-to-phase) This parameter affects the measure of the input voltages when the primary measurement reading mode is selected. If the formerly indications concerning the relay nominal voltage U n are complied (Phase to ground and phase-to-phase VTS connection diagrams), then the U np setting must be adjusted to: U np = grid nominal voltage [V]]. CHARACTERISTICS NV10P - Manual

46 Example 1 U ng = 6.0 kv 52 K TV = 6000 / / 3 V = 60 V NV10P U n = 58 V Grid nominal voltage U ng = 6.0 kv VTs ratio: K TV = Relay nominal voltage U n = 58 V 6000 / 3 V = / 3 V Es1-Ung.ai The U np setting must be adjusted to: U np = U ng = 6.0 kv Example 2 U ng = 6 kv 52 K VT = 6000 / / 3 V = 60 V NV10P Grid nominal voltage U ng = 6 kv U n = 100 V VTs ratio: K 6000 / 3 V TV = = / 3 V Relay nominal voltage U n = 100 V Es2-Ung.ai Example 3 The U np setting must be adjusted to: U np = U ng = 6 kv U ng = 400 V 52 NV10P U n = 400 V Es3a-Un.ai The U np setting must be adjusted to: U np = U ng = 400 V Residual primary voltage U Enp This parameter affects the measure of the direct residual voltage when the primary measurement reading mode is selected. If the formerly indications concerning the relay nominal residual voltage U En are complied, then the U Enp setting must be adjusted to (effective for insulated neutral or impedance-ground connected grids): U Enp = 3 grid nominal voltage [V]. Example 1 U ng = 6.9 kv Insulated or impedance-ground neutral / 3 K VT = 100 / 3 V = 100 V 3 NV10P U En = 69 V Grid nominal voltage U ng = 6.9 kv / 3 / VT ratio: K VT = Relay residual nominal voltage U En = 69 V 100 / 3 V = 100 V 3 Es-UEnp.ai The U Enp setting must be adjusted to: U Enp = 3 U ng = V = V 46 NV10P - Manual CHARACTERISTICS

47 Example 2 U ng = 10 kv NV10P / 3 V K VT = = 110 / 100 V 3 U En = 91 V Grid nominal voltage U ng = 10 kv / 3 V VTs ratio: K VT = = 110 / 100 V 3 Relay nominal voltage U n = 91 V The U Enp setting must be adjusted to: U Enp = 3 U ng = V = V Electronic sensor versions Relay nominal voltage U n The voltage sensor is considered equivalent to a VT with (20000 / 3) / (100 / 3) voltage transformation ratio. When the grid rated voltage divided by 3 corresponds to the sensors rated primary voltage (20000 / 3), the relay rated voltage U [1] n should be set to U n = 100 V (default setting). 52 U ng = 20 kv K TV = 200 U n = 100 V NV10P Grid nominal voltage U ng = 20 kv Ratio of voltage sensors: K TV = U np /U ns = (20000 / 3) / (100 / 3) = 200 When the grid rated voltage divided by 3 is different from the value of rated primary voltage of the sensors (20000 / 3) the relay rated voltage U n is calculated by the following general formula: U n = U ng /K TV in the example given below, which corresponds to U n = / 200 = 50 V. 52 U ng = 10 kv K TV = 200 U n = 50 V NV10P Grid nominal voltage U ng = 10 kv Ratio of voltage sensors: K TV = U np /U ns = (20000 / 3) / (100 / 3) = 200 Relay residual nominal voltage U En The rated residual voltage of the relay U ECn is automatically calculated by the relay: U ECn = 3 U n Example U ng = 20 kv NV10P 52 K TV = 200 U n = 100 V U ECn = 173 V As per the above example U n = 100 V. The relay will automatically calculate: U ECn = U n 3 = = 173 V If the threshold required is expressed in primary Volts the setting is calculated by the following general formula: U E>>def = threshold / (U ng / 3); e.g. U ng = and threshold 59N = 577 V (primary): U E>>def = 577 / ( / 3 = 0.05 U ECn Measurement reading mode Measures may be displayed according the following operating modes: - With RELATIVE setting all measures are related to the nominal value, - With PRIMARY setting all measures are related to the primary value. Note 1 U n represents the reference value to which all the adjustments are expressed Grid nominal voltage U ng = 20 kv Ratio of voltage sensors: K TV = U np /U ns = (20000 / 3) / (100 / 3) = 200 CHARACTERISTICS NV10P - Manual

48 Application notes concerning to the Vts positioning Both transducers residual as well as voltage and frequency VTs are normally to be installed upstream of the CB. Grid Grid 2xVT-I phase-phase 3xVT-I phase-ground SPI 3xVT-NI phase-ground I SPI CB CB Load Load VOLTAGE AND FREQUENCY VTs POSITIONING Only for static generators, it is permissible to install it downstream of the CB but: A) exclusion of protective elements must be provided when CB is open (to avoid that the CB closing is forbidden) and B) when the CB closes (after removal of the exclusion), the SPI should automatically set the operate time of the f>>, f<<, UE>> thresholds to a reduced time (while maintaining the response time of the remaining thresholds) for a time of at least 30 s after the closing of the CB. Grid Grid DDI DDI 2xTV-I phase-phase SPI 3xVT-NI phase-ground I SPI Load Load A) The element disabling when the circuit breaker is open can be selected by setting ON the xxdisbycb_open parameters inside the Set \ Profile A(or B) \ yy \ Setpoints, menu where xx is is the element that you want to disable (eg: f>) and yy is the corresponding function (eg: Overfrequency-81O). B) When the CB closes, the operate time of the f >>, << f, UE >> elements is automatically adjusted to a reduced value tcxx>>def for an adjustable time tatcxx>>def. The reduction of the operate time for the second threshold can be selected by setting the EnTcxx>>def parameter inside the Set \Profile A(or B) \ yy \ xx>> Element \ Setpoints menu, while the timers are adjustable inside the Set \Profile A(or B) \ yy \ xx>> Element \ Definite time menu. CB State TV downstream CB OPEN (52a=OFF) CB CLOSED (52a=ON) t atcf>>def t f>> t f>>= t cf>>def t f>>= t cf>>def t f>>= t f>>def t atcf>>def t cf>>def t f>>def 0 1 (closing) t atcf>>def DDI OFF->ON (1 upstream) T 0 t f>> EnTcf>>def RESET T 0 RESET Operate time reduction after CB closing (eg: f>> element) 48 NV10P - Manual CHARACTERISTICS

49 RESIDUAL VOLTAGE VTs POSITIONING Installation downstream of the DDI is admitted but, to avoid that at reclosing of the DDI a possible single-phase fault to ground is fed until trip of 59N protection (25 s), the two following alternatives are possible: only for static generators, the generator must wait for a time of at least 30 s before connecting to the grid; for all generators (with the exception of synchronous generators) that the SPI, on the closing command of the DDI, automatically set the operate time off>>, f<<, UE>> thresholds to 0.20 s for a time of at least 30 s after the closing of the DDI. Grid Grid DDI DDI 3xVt-I phase-phase SPI 3xVt-NI phase-ground I SPI Load Load A) The element disabling when the circuit breaker is open can be selected by setting ON the xxdisbycb_open parameters inside the Set \ Profile A(or B) \ yy \ Setpoints, menu where xx is is the element that you want to disable (eg: f>) and yy is the corresponding function (eg: Residual overvoltage-59n). B) When the CB closes, the operate time of the f >>, << f, UE >> elements is automatically adjusted to a reduced value tcxx>>def for an adjustable time tatcxx>>def. The reduction of the operate time for the second threshold can be selected by setting the EnTcxx>>def parameter inside the Set \Profile A(or B) \ yy \ xx>> Element \ Setpoints menu, while the timers are adjustable inside the Set \Profile A(or B) \ yy \ xx>> Element \ Definite time menu. CB State TV downstream CB OPEN (52a=OFF) CB CLOSED (52a=ON) t atcue>>def t UE>> t UE>>= t cue>>def t UE>>= t cue>>def t UE>>= t UE>>def t atcue>>def t cue>>def t UE>>def 0 1 (closing) DDI OFF->ON (1 upstream) EnTcUE>>def t atcue>>def T 0 RESET Operate time reduction after CB closing (eg: UE>> element) ) t UE>> T 0 RESET CHARACTERISTICS NV10P - Manual

50 Thermal protection with RTD thermometric probes - 26 Preface The measure of temperature is acquired by means of Pt100 (RTD Resistive Temperature sensing Devices) probed, connected to the MPT module. [1] A direct thermal protection element with eight PT100 thermometric probes (RTD Resistive Thermal Device) provides protection against premature ageing or breakdown of the insulating materials through overheating. Thermal protection using thermometric probes offers greater reliability than Thermal overload-based indirect protection, since it is not influenced by inaccuracies in the time constant for the thermal model of the machinery and by variations in the surrounding temperature. t t ThALx TRIP t Th> x Th> x T ( C) t-int-f26.ai General operation time characteristic for thermal protection with RTD thermometric probes (26) For each thermometric probe an alarm (Th ALx, where x=1...8 points one of the eight probes) and one trip adjustable threshold is provided (Th> x), with adjustable operating time (t ThALx and t Th> x>);if the measured temperature overcomes the threshold, the relative alarm and/or trip is issued when the timer expires. The adjustments are operable in C. Pt100 MPT Thybus ThAL x enable Th ALx Alarm Element t ThALx ALARM Th> x enable Th> x Trip Element Th>xBF Trip Th>x t Th> x TRIP Th>xBF General logic diagram of the thermal elements - (26) all-f26.ai The probes should be placed in strategic points around the machinery susceptible to the greatest overheating, such as for example: - near the generator stator windings, near the step-up transformer windings and/or in the oil, with the aim of detecting overheating produced by the overload currents, - near the generator bearings, with the aim of detecting localised overheating due to worn or nonlubricated bearings. The Pt100 probes detect the temperature in the range -50 C C (at 0 C its resistance is 100 ohm); an alarm indicates any interruption or short-circuiting of the probe or related connections to the MPT module; the information is available inside the Read \ PT100 menu: Ptx probe ON to point a measure inside the range Ptx probe LOW to point a measure lower the range (short circuit of probe and/or wires) Ptx probe HIGH ao point a measure higher the range (breaking of probe and/or wires). Self reset is performed when faults are cleared. The measure of each probe is updated at 2 s time intervals. 2.0s Pt1 Pt2 Pt3 Pt4 Pt5 Pt6 Pt7 Pt8 Pt1 0.25s 0.25s 0.25s 0.25s 0.25s 0.25s 0.25s 0.25s t Pt1...8 update t-refresh-f26.ai Note 1 The 26 menu is available when the MPT module is enabled 50 NV10P - Manual CHARACTERISTICS

51 All alarm and/or trip elements can be enabled or disabled by setting ON or OFF the ThALx Enable e Th>x Enable parameters inside the Set \ Profile A(or B) \ Thermal protection with RTD thermometric probes - 26 \ PTx Probe \ ThALx Alarm (ThALx Trip) where x = Each trip threshold (Th>x) may be associated with the breaker failure (BF) function by setting ON the Th>xBF parameters inside the Set \ Profile A(or B) \ Thermal protection with RTD thermometric probes - 26 \ PTx Probe \ ThALx Trip where x = [1] Th ALx t ThALx Pt100-xAlarm Pt1 Pt2 Pt3 Pt4 Pt5 Pt6 Pt7 Pt8 Pt x T C Pt100 OK Pt100 FAULT T C Th>xBF BF Enable (ON Enable) T > Th ALx Th> x T > Pt x> Pt x> Diagnostic TRIP t ThALx T 0 t Th> x t Th> x T 0 TOWARDS DIAGNOSTIC Th>x BF_OUT ThALx-K ThALx-L Th>x-K Th>x-L Pt100-x Trip TRIPPING MATRIX (LED+RELAYS) TOWARDS BF LOGIC Logic diagram for thermal protection with RTD thermometric probes (26) Fun-F26.ai Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. CHARACTERISTICS NV10P - Manual

52 Undervoltage - 27 Preface Two operation thresholds, independently adjustable with adjustable delay. The first one may be programmed with definite or inverse time, while the second threshold operates with definite time characteristic. Each threshold may be separately enabled or disabled. The first threshold trip may be inhibited by start of the second threshold. Operation and settings The fundamental frequency of the input voltages (U L1, U L2, U L3) are utilized. Each of three voltages compared with the setting values (U<, U<<). The start and trip logic may be selected OR or AND. With OR selection, a start is issued when at least one of the three voltages goes down the adjustable threshold (START); with AND selection, a start is issued when all the three voltages goes down the adjustable threshold. After expiry of the associated operate time (t U<, t U<<) a trip command is issued; if instead the voltages drops below the threshold, the element it is restored. The first threshold (U<) may be programmed with definite or inverse time according the following characteristic curve: t=0.75 t U<inv / [1-(U/U< inv)] Where: t: operate time U< inv: threshold setting t U<inv: operate time setting For the inverse time characteristic, following data applies: The operate time setting is referred to an input voltage equal to 1/4 of the pickup value. Asymptotic reference value (minimum pickup value): 0.9 U< Minimum operate time: 0.1 s Range where the equation is valid: 0 U/U< inv 0.9 The first undervoltage element can be programmed with definite or inverse time characteristic by setting the U<Curve parameter (DEFINITE, INVERSE) available inside the Set \ Profile A(or B) \ Undervoltage-27 \ U< Element \ Setpoints menu. Each element can be enabled or disabled by setting ON or OFF the U< Enable parameter inside the Set \ Profile A(or B) \ Undervoltage-27 \ U< Element \ Setpoints menu and/or the State parameter inside the Set \ Profile A(or B) \ Undervoltage-27 \ U<< Element \ Definite time. t t U< TRIP t U<< 0.9U< U<< U< U General operation time characteristic for the undervoltage elements - 27 t-int-f27.ai The operating logic (AND or OR) is adjustable inside the Set \ Profile A(or B) \ Undervoltage-27 \ Common configuration menu by means the Logic27 parameter; the allowed settings are OR (at least one voltage lower than threshold) or And (all three voltage must be lower than threshold). The first threshold trip (U<) may be inhibited by start of the second threshold (U<<) by setting ON the U< Disabling by U<< start (U<disbyU<<) parameter available inside the Set \ Profile A(or B) \ Undervoltage-27 \ U<< Element \ Setpoints menu. User can disable both 27 protection thresholds from the keyboard. During this command, the trip output relay (U <and / or U << thresholds) are forced to reset state, the message 27 Disabled is displayed and all LEDs blink until the end of the command. The elements can be disabled in the case of connection of the measuring inputs (TV or TV-I-NI) downstream of the Device Interface when the DI is open. The threshold disabling is selected by setting ON the U<disbyCB_OPEN, U<<disbyCB_OPEN parameters, inside the Set \ Profile A(or B) \ Undervoltage-27 \ U< Element (U<< Element) \ Setpoints menu. 52 NV10P - Manual CHARACTERISTICS

53 Only with sensor versions Utype27 Logic27 MMI Disable 27 function by operator U 12,U 23,U 31 U L1,U L2,U L3 AND OR Common configuration U State U<< def t U<< def U< Enable U< Curve U< def U< inv t U< def t U< inv U<< Element Start U<< U< Element Start U< Trip U<< Trip U< U U U<<BF U<BF U<<BF U< disbyu<< U<BF Trip U<< Trip U< U< inhibition Start U<< U<<BLK1 U<BLK1 Start U< Start U<< BLK1U<< BLK1U< Block1 Block1 General logic diagram of the undervoltage elements - 27 all-f27.ai ON Enable U< undervoltage element U< Enable U L1 U L2 U L3 U< def U U< def Enable (ON Enable) U< inv U U< inv 1 State U< Inhibition (ON Inhibit) DDI state (1 DDI closed) (1 upstream) 1 U<disbyCB_OPEN U<BLK1 Enable (ON Enable) Block1 Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx U<BF BF Enable (ON Enable) State MMI Disable 27 function by operator U< Curve Logic27 1 T 0 Start U< Trip U< Block1 input (ON Block) Trip U< Logic diagram concerning the first threshold (U<) of the undervoltage element - 27 t U<def t U<inv t U< T 0 RESET U< BF Start U< U<ST-K U<ST-L U<TR-K U<TR-L Trip U< BLK1U< Block1 towards BF logic TRIPPING MATRIX (LED+RELAYS) Fun-F27_S1.ai CHARACTERISTICS NV10P - Manual

54 Breaker failure (BF) All undervoltage elements can produce the Breaker Failure output if the U< BF and U<< BF parameters are set to ON. The parameters are available inside the Set \ Profile A(or B) \ Undervoltage - 27 \ U< Element (U<< Element) \ Setpoints menus. [1] All the named parameters can be set separately for Profile A and Profile B (Set \ Profile A(or B) \ Undervoltage - 27 \ U< Element (U<< Element) \ Setpoints menus). For every of the two thresholds the logic block can be set. U<disbyU<< (ON Inhibit) U< Inhibition U L1 U L2 U L3 U<< def U U< def State MMI Enable (ON Enable) Disable 27 function by operator 1 Logic27 t U<<def t U<< T 0 RESET Start U<< U<<ST-K U<<ST-L U<<TR-K U<<TR-L TRIPPING MATRIX (LED+RELAYS) DDI state U<<disbyCB_OPEN (1 DDI closed) (1 upstream) 1 Trip U<< U<<BLK1 Enable (ON Enable) Start U<< Trip U<< BLK1U< Block1 Logic INx t ON INx t OFF U<<BF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx BF Enable (ON Enable) Block1 input (ON Block) Trip U<< U<< BF Block1 towards BF logic Logic diagram concerning the second threshold (U<<) of the undervoltage element - 27 Fun-F27_S2.ai Logical block (Block1) If the U<BLK1 and/or U<<BLK1 enabling parameters are set to ON and a binary input is designed for logical block (Block1), the protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down. [2] The enabling parameters are available inside the Set \ Profile A(or B) \ Undervoltage - 27 \ U< Element (U<< Element) \ Setpoints menus, while the Block1 function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching). Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. Note 2 The exhaustive treatment of the logical block (Block 1) function may be found in the Logic Block paragraph inside CONTROL AND MONITOR- ING section. 54 NV10P - Manual CHARACTERISTICS

55 10000 t [s] t =t U <inv 0.75 [1 - (U/U< inv )] 1000 t U<inv = 100 s 100 t U<inv = 10 s 10 t U<inv = 1 s 1 t U<inv = 0.1 s U /U<inv Note: match of operating and setting time takes place when U/U< inv = 0.25 Inverse time operating characteristic concerning the first threshold (U<) of the undervoltage element - 27 F_27-Char.ai CHARACTERISTICS NV10P - Manual

56 Positive sequence undervoltage - 27V1 Preface The protection has an adjustable threshold and definite time characteristic. Enabling or disabling is provided by means ThySetter, the element can be temporarily blocked by keyboard command. Operation and settings The positive sequence voltage is calculated as: U 1=(U L1+e +j120 U L2+e -j120 U L3)/3 where U L1, U L2 and U L3 are the phase-ground for versions with inputs from electronic sensors, or U 1=(U 12+e +j120 U 23+e -j120 U 31)/3 where U 12, U 23 e U 31 are the voltages for versions with inputs from inductive VTs phase-to-phase, or by direct measurement of line voltages and with e -j120 =-1/2-j 3/2, e j120 =-1/2+j 3/2. For versions with voltage inputs from phase to earth measurement, the thresholds are expressed in pu E n, for versions with phase-to-phase inputs from inductive VTs or direct measurement, the thresholds are expressed in pu U n. The voltage of the positive sequence is compared with the threshold (U 1< def). A start is issued when the positive sequence voltage falls below adjustable threshold (START). After expiry of the associated operate time (t U1<) a trip command is issued; if instead the voltages drops below the threshold, the element it is restored. The element can be enabled or disabled by setting ON or OFF the State parameter inside the Set \ Profile A(or B) \ Positive sequence undervoltage-27v1 \ U1< Element \ Definite time menu. t TRIP t U1< U 1< U 1 General operation time characteristic for the positive sequence undervoltage elements - 27V1 The user can disable the 27V1 protection by means of a keyboard command (DISABLE 27 FUNCTION BY OPERATOR). During this command, the output trip relays (manual or automatic reset, normally energized or de-energized) are forced to idle state, the Disable 27-27V1 message is displayed and all the LEDs flash until the end of the command. The element can be disabled in the case of connection of the measuring inputs (TV or TV-I-NI) downstream of the Device Interface when the DI is open. The threshold disabling is selected by setting ON the U1<disbyCB_OPEN parameter, inside the Set \ Profile A(or B) \ Positive sequence undervoltage-27v1 \ U1< Element \ Setpoints menu. MMI Disable 27 functions by operator State U 1< def t U1< def U1< Element Start U1< Trip U1< U 1 U1<BF Trip U1< U1<BF Block1 U1<BLK1 Start U1< BLK1U< General logic diagram of the positive sequence undervoltage elements - 27V1 all-f27v1.ai Breaker failure (BF) The undervoltage element can produce the Breaker Failure output if the U1< BF parameter is set to ON. The parameter is available inside the Set \ Profile A(or B) \ Positive sequence undervoltage - 27V1 \ U1< Element \ Setpoints menu. [1] Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. 56 NV10P - Manual CHARACTERISTICS

57 Logical block (Block1) If the U1<BLK1 enabling parameter is set to ON and a binary input is designed for logical block (Block1), the protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down. [1] The enabling parameter is available inside the Set \ Profile A(or B) \ Positive sequence undervoltage - 27V1 \ U1< Element \ Setpoints menus, while the Block1 function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching). All the named parameters can be set separately for Profile A and Profile B. Disable 27 function by operator Start U1< U 1 DDI state U1<disbyCB_OPEN U 1< def U 1 U 1< def State (1 DDI closed) (1 upstream) (ON Inhibit) 1 t U1<def U1<def Tt 0 RESET U1<ST-K U1<ST-L U1<TR-K U1<TR-L Trip U1< TRIPPING MATRIX (LED+RELAYS) U1<BLK1 Enable (ON Enable) Start U1< Trip U1< BLK1U1< Block1 U1<BF Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx BF Enable (ON Enable) Block1 input (ON Block) Trip U1< U1< BF Block1 towards BF logic Logic diagram concerning the positive sequence undervoltage element - 27V1 Fun-F27V1_S1.ai Note 1 The exhaustive treatment of the logical block (Block 1) function may be found in the Logic Block paragraph inside CONTROL AND MONITOR- ING section. CHARACTERISTICS NV10P - Manual

58 Overvoltage - 59 Preface Two operation thresholds, independently adjustable with adjustable delay. The first one may be programmed with definite or inverse time, while the second threshold operates with definite time characteristic. Each threshold may be separately enabled or disabled. The first threshold trip may be inhibited by start of the second threshold. Operation and settings The fundamental frequency of input voltages are utilized. Each of three voltages is compared with the setting values (U>, U>>). The start and trip logic may be selected OR or AND; with OR selection, a start is issued when at least one of the three voltages overcomes the adjustable threshold (START); after expiry of the associated operate time (t U>, t U>>) a trip command is issued; if instead the voltages drops below the threshold, the element it is restored. With AND selection, a start is issued when all the three voltages overcomes the adjustable threshold; after expiry of the associated operate time (t U>, t U>>) a trip command is issued; if instead the current drops below the threshold, the element it is restored. The first threshold (U>) may be programmed with definite or inverse time according the following characteristic curve: t=0.5 t U> inv / [(U/U> inv) - 1] Where: t: operate time U> inv: threshold setting t U>inv: operate time setting For the inverse time characteristic, following data applies: The operate time setting is referred to an input voltage equal to 1.5 of the pickup value. Asymptotic reference value (minimum pickup value): 1.1 U> inv Minimum operate time: 0.1 s Range where the equation is valid: 1.1 U/U> inv 4 If U> inv pickup 0.5 U n, the upper limit is 2 U n. The first overvoltage element can be programmed with definite or inverse time characteristic by setting the U>Curve parameter (DEFINITE, INVERSE) available inside the Set \ Profile A(or B) \ Overvoltage-59 \ U> Element \ Setpoints menu. Each element can be enabled or disabled by setting ON or OFF the U> Enable parameter inside the Set \ Profile A(or B) \ Overvoltage-59 \ U> Element \ Setpoints menu and/or the State parameter inside the Set \ Profile A(or B) \ Overvoltage-59 \ U>> Element \ Definite time. t t U> TRIP t U>> U> U>> General operation time characteristic for the overvoltage elements - 59 U t-int-f59.ai The operating logic (AND or OR) is adjustable inside the Set \ Profile A(or B) \ Overvoltage-59 \ Common configuration menu by means the Logic59 parameter; the allowed settings are OR (at least one voltage larger than threshold) or And (all three voltage must be larger than threshold). The first threshold trip (U>) may be inhibited by start of the second threshold (U>>) by setting ON the U> Disabling by U>> start (U>disbyU>>) parameter available inside the Set \ Profile A(or B) \ Overvoltage-59 \ U>> Element \ Setpoints menu. The elements can be disabled in the case of connection of the measuring inputs (TV or TV-I-NI) downstream of the Device Interface when the DI is open. The threshold disabling is selected by setting ON the U>disbyCB_OPEN, U>>disbyCB_OPEN parameters, inside the Set \ Profile A(or B) \ Overvoltage-59 \ U> Element (U>> Element) \ Setpoints menu. 58 NV10P - Manual CHARACTERISTICS

59 Only with sensor versions Utype59 Logic59 U 12,U 23,U 31 U L1,U L2,U L3 AND OR Common configuration U State U>> def t U>> def U> Enable U> Curve U> def U> inv t U> def t U> inv U Block1 U>>BLK1 U>> Element U> Element Start U>> Start U> U Trip U>> Trip U> U>BF U> disbyu>> U>BF Trip U> U> inhibition Start U>> Start U>> U>BLK1 Start U> BLK1U>> BLK1U> Block1 General logic diagram of the overvoltage elements - 59 all-f59.ai Breaker failure (BF) Both overvoltage elements can produce the Breaker Failure output if the U> BF and U>>BF parameters are set to ON. The parameters are available inside the Set \ Profile A(or B) \ Overvoltage - 59 \ U> Element (U>> Element) \ Setpoints menus. [1] All the parameters can be set separately for Profile A and Profile B (Set \ Profile A(or B) \ Overvoltage - 59 \ U> Element (U>> Element) \ Setpoints menus). U> Enable ON Enable U> overvoltage element Only for sensor versions U> def State U L1 U 12 Utype59 U U> def U> inv State 1 Start U> U L2 U 23 U L3 U 31 U U> inv 1 Logic59 U> Curve T 0 t U>def t U>inv t U> T 0 RESET U>ST-K U>ST-L U>TR-K U>TR-L TRIPPING MATRIX (LED+RELAYS) U> Inhibition (ON Inhibit) DDI state (1 DDI closed) U>disbyCB_OPEN (1 upstream) U>BLK1 Enable (ON Enable) 1 Start U> Trip U> Trip U> BLK1U> Block1 Logic INx t ON INx t OFF U>BF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx BF Enable (ON Enable) Block1 input (ON Block) Trip U> U> BF Block1 towards BF logic Logic diagram concerning the first threshold (U>) of the overvoltage element - 59 Fun-F59_S1.ai Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. CHARACTERISTICS NV10P - Manual

60 For every of the two thresholds the logic block can be set. Logical block (Block1) If the U>BLK1 and/or U>>BLK1 enabling parameters are set to ON and a binary input is designed for logical block (Block1), the protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down. [1] The enabling parameters are available inside the Set \ Profile A(or B) \ Overvoltage - 59 \ U> Element (U>> Element) \ Setpoints menus, while the Block1 function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching). ON Enable U>> overvoltage element State Only for sensor versions Utype59 U L1 U 12 U L2 U 23 U L3 U 31 U>> def U U>> def State 1 Logic59 U>disbyU>> (ON Inhibit) t U>>def t U>> T 0 RESET U> Inhibition Start U>> U>>ST-K U>>ST-L U>>TR-K U>>TR-L TRIPPING MATRIX (LED+RELAYS) DDI state U>>disbyCB_OPEN Enable (ON Enable) U>>BLK1 (1 DDI closed) (1 upstream) 1 Start U>> Trip U>> Trip U>> BLK1U> Block1 Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx U>>BF Block1 input (ON Block) Trip U>> BF Enable (ON Enable) U>> BF Block1 towards BF logic Logic diagram concerning the second threshold (U>>) of the overvoltage element - 59 Fun-F59_S2.ai Note 1 The exhaustive treatment of the logical block (Block 1) function may be found in the Logic Block paragraph inside CONTROL AND MONITOR- ING section. 60 NV10P - Manual CHARACTERISTICS

61 10000 t [s] t =t U >inv 0.5 [(U/U> inv ) - 1] t U> inv= 100 s 10 t U> inv= 10 s 1 t U> inv= 1 s 0.1 t U> inv= 0.1 s U /U >inv Note: match of operating and setting time takes place when U/U> inv = 1.5 Inverse time operating characteristic concerning the first threshold (U>) of the overvoltage element - 59 F_59-Char.ai CHARACTERISTICS NV10P - Manual

62 Average overvoltage (59avg) Preface The protection has an adjustable threshold and definite time characteristic. Enabling or disabling is provided by means ThySetter. For inputs from sensors versions, the type of measurement of line voltages and phase voltages may be select. Operation and settings The fundamental component of the three input voltages is measured and the arithmetic mean of the values of U L1, U L2, U L3 phase voltages (versions with inputs from sensors) or U 12, U 23, U 31 phase-tophase voltages (versions with inputs from inductive VTs) is calculated on the values acquired every 0.2 seconds in a time interval of ten minutes with updates every three seconds on a sliding window of 10 minutes (200 values ) as indicated below: The RMS voltages are acquired every 0.2 seconds; Separately for each phase, the acquired values are aggregated to 10 minutes (600 s) performing the square root of the arithmetic mean of the last 600/0, 2 = 3000 values squared. The aggregation of 10 minutes is updated every 3 s. U m = (Ui) i=1 In response to a step change of the input voltage U (with voltage initially already stabilized), the voltage U m has a transitional trend with square-law as shown in the following figure. 1.3 U Um Ten minutes RMS voltage (59Uavg) The pickup time depends on reference conditions [1] Each of three voltages is compared with the setting values. The start and trip logic may be selected OR or AND; with OR selection, a start is issued when at least one of the three voltages overcomes the adjustable threshold (START); after expiry of the associated operate time a trip command is issued; if instead the average voltages drops below the threshold, the element it is restored. With AND selection, a start is issued when all the three average voltages overcomes the adjustable threshold; after expiry of the associated operate time a trip command is issued; if instead the average voltages drops below the threshold, the element it is restored. t TRIP t Uavg> def U avg> def General operation time characteristic for the average overvoltage element - 59Uavg The operating logic (AND or OR) is adjustable inside the Set \ Profile A(or B) \ Average overvoltage- 59Uavg \ Common configuration menu by means the Logic59Uavg parameter; the allowed settings are OR (at least one voltage larger than threshold) or And (all three voltage must be larger than threshold). Note 1 The pickup time depends on the initial and final value of the input voltage; e.g. with a setting of threshold equal to 1.10 Un: - with initial value 0 and final value 1.1 Uavg> def (1.1x1.1 = 1.21 Un) the pickup time is 498 s - with initial value 0.9 Uavg>def (0.9x1.1 = 0.99 Un) and final value 1.1 Uavg>def (1.1x1.1 = 1.21 Un) the pickup time is 285 s Uavg 62 NV10P - Manual CHARACTERISTICS

63 With inputs from sensors versions, the type of measurement of line-to-line voltages and phase voltages may be select: the Utype59Uavg parameter in the Set \ Profile A(or B) \ Average overvoltage- 59Uavg \ Common configurations menu may be set. The possible settings are Uph-ph (voltages) or Uph-n (phase voltages). The element can be disabled in the case of connection of the measuring inputs (TV or TV-I-NI) downstream of the Device Interface when the DI is open. The threshold disabling is selected by setting ON the Uavg>disbyCB_OPEN parameter, inside the Set \ Profile A(or B) \ Average overvoltage-59uavg \ Uavg> Element \ Setpoints menu. Only with sensor versions Uavg> Enable Uavg> def t Uavg> def U 12,U 23,U 31 U L1,U L2,U L3 Utype59Uavg Logic59Uavg AND OR Common configuration U U Block1 U xxavg Uavg>BLK1 Uavg> Element Uavg>BF Trip Uavg> Start Uavg> Start Uavg> Trip Uavg> Uavg>BF BLK1Uavg> General logic diagram of the average overvoltage elements - 59Uavg all-f59uavg.ai Breaker failure (BF) The average overvoltage element can produce the Breaker Failure output if the Uavg> BF parameter is set to ON. The parameter is available inside the Set \ Profile A(or B) \ Average overvoltage - 59Uavg \ Uavg> Element \ Setpoints menus. Uavg> Enable ON Enable Uavg> overvoltage element Only for sensor versions Utype59Uavg U L1 U 12 U L2 U 23 U L3 U 31 U avg> def U U avg> def DDI state Uavg>disbyCB_OPEN State 1 (1 DDI closed) (1 upstream) 1 Uavg>BLK1 Block1 Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T Logic59Uavg Start Uavg> Trip Uavg> Block1 input (ON Block) Binary input INx Trip Uavg> BF Enable (ON Enable) Uavg>BF General logic diagram of the average overvoltage threshold - 59Uavg> t Uavg>def t Uavg>def T 0 RESET Uavg> BF Start Uavg> Uavg>ST-K Uavg>ST-L Uavg>TR-K Uavg>TR-L Trip Uavg> BLK1Uavg> Block1 TRIPPING MATRIX (LED+RELAYS) towards BF logic Logical block (Block1) If the Uavg>BLK1 enabling parameter is set to ON and a binary input is designed for logical block (Block1), the protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down. The enabling parameters are available inside the Set \ Profile A(or B) \ Average overvoltage - 59Uavg \ Uavg> Element \ Setpoints menus, while the Block1 function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching). All the parameters can be set separately for Profile A and Profile B. CHARACTERISTICS NV10P - Manual

64 Residual overvoltage - 59N Preface Two operation thresholds, independently adjustable (U E>, U E>>) with adjustable delay (t UE>, t UE>>). The fundamental component of the residual voltage is computed, therefore the element is insensitive to the third harmonic components. The first threshold (U E>) can be programmed with definite or inverse time, while the second threshold operates with definite time characteristic. Each threshold may be separately enabled or disabled. The first threshold trip (U E>) may be inhibited by start of the second threshold (U E>>). Operation and settings With VTs input version two measuring criteria of the residual voltage are provided: Direct Calculated. while for versions with inputs from sensors the residual voltage is always calculated. For direct measure the fundamental component of the residual voltage input is used (U E), whereas, for calculated measure (U EC) the residual voltage comes from a vector sum of three phase voltage phasors. U EC= U L1+U L2+U L3 The residual voltage (U E or U EC) is compared with the setting values (U E>, U E>>); a start is issued when the residual voltage overcomes the adjustable threshold (START); after expiry of the associated operate time (t UE>, t UE>>) a trip command is issued; if instead the voltage drops below the threshold, the element it is restored. The first threshold (U E>) may be programmed with definite or inverse time according the following characteristic curve: t=0.5 t UE> inv / [(U E/U E> inv) - 1] or t=0.5 t UE> inv / [(U EC/U E> inv) - 1] Where: U E: measured residual voltage U EC: calculated residual voltage t: operate time U E> inv: pickup value t UE>inv: operate time setting For the inverse time characteristic, following data applies: The operate time setting is referred to an input voltage equal to 1.5 of the pickup value. Asymptotic reference value (minimum pickup value): 1.1 U E> inv Minimum operate time: 0.1 s Range where the equation is valid: 1.1 U E/U E> inv (U EC/U E> inv) 4 If U E> inv pickup 0.5 U En, the upper limit is 2 U En. The first residual overvoltage element can be programmed with definite or inverse time characteristic by setting the UE> Curve parameter (DEFINITE, INVERSE) available inside the Set \ Profile A(or B) \ Residual overvoltage-59n \ UE> Element \ Setpoints menu. For definite time characteristic the upper limit is 2 U En. Each element can be enabled or disabled by setting ON or OFF the UE> Enable parameter inside the Set \ Profile A(or B) \ Residual overvoltage-59n \ UE> Element \ Setpoints menu and/or the State parameter inside the Set\Profile A(or B) \ Residual overvoltage-59n \ UE>> Element \ Definite time. t t UE> TRIP t UE>> U E> Selection of the measuring criteria of the residual voltage (direct measure or calculated measure) is available inside the Set \ Profile A(or B) \ Residual overvoltage-59n \ Common configuration menu; The 3Votype59N parameter may be select as UE (direct measure) or UEC (calculated measure). 64 NV10P - Manual CHARACTERISTICS U E>> General operation time characteristic for the residual overvoltage elements - 59N U E

65 With UE setting (direct voltage measurement), the thresholds are in p.u. U En, with UEC setting (calculated voltage measurement), the thresholds are in p.u. U ECn. For both measuring criteria, a block of the U E> and U E>> threshold may be select when the 74VT function is active (external by binary input). The blocking enabling parameter 74VText59N is available inside the Set \ Profile A(or B) \ Residual overvoltage-59n \ Common configuration menu. [1] The first threshold trip (U E>) may be inhibited by start of the second threshold (U E>>) by setting ON the UE> Disabling by UE>> start (UE>disbyUE>>) parameter available inside the Set \ Profile A(or B) \ Residual overvoltage-59n \ UE>> Element \ Setpoints menu. The elements can be disabled in the case of connection of the measuring inputs (TV or TV-I-NI) downstream of the Device Interface when the DI is open. The threshold disabling is selected by setting ON the UE>disbyCB_OPEN, UE>>disbyCB_ OPEN parameters, inside the Set \ Profile A(or B) \ Residual overvoltage-59n \ UE> Element (UE>> Element) \ Setpoints menu. When the CB closes, the operate time of the UE >> element is automatically adjusted to a reduced value tcue>>def for an adjustable time tatcue>>def. The reduction of the operate time for the second threshold can be selected by setting the EnTcUE>>def parameter inside the Set \Profile A(or B) \ Residual overvoltage-59n \ UE>> Element \ Setpoints menu, while the timers are adjustable inside the Set \Profile A(or B) \ Residual overvoltage-59n \ UE>> Element \ Definite time menu. Common configuration Only with TV versions 3Votype59 N U E (misura diretta) U EC (misura calcolata) U E 74VText 74VText59 N 74VText-Block State t UE>>RES UE>> def UE> Enable UE> Curve t UE>RES t UE>> def UE> def UE> inv t UE> def t UE> inv U E 74VText-Block UE>> Element Start UE>> Trip UE>> U E UE> disbyue>> 74VText-Block Start U>> U> inhibition UE> Element UE>BF Trip UE> Start UE> Trip UE> UE>BF Block1 UE>>BLK1 Start UE>> BLK1UE>> Block1 UE>BLK1 Start UE> BLK1UE> Logic diagram concerning the residual overvoltage element - 59N all-f59n.ai An adjustable reset time delay is provided for every threshold t UE>RES, t UE>>RES. INPUT t UE>RES t UE>RES t UE>RES UE> Start t UE> t UE> UE> Trip RESET Timers concerning the first element of residual overvoltage protection- 59N t Timers-F59N.ai Breaker failure (BF) Both residual overvoltage elements (U E>, U E>>) can produce the Breaker Failure output if the UE>BF and UE>>BF parameters are set to ON. The parameters are available inside the Set \ Profile A(or B)\Residual overvoltage - 59N \ UE> Element (UE>> Element) \ Setpoints menus. [2] Note 1 The operating time must be adjusted to a greater value than the 74VT activation time (internal or binary input) Note 2 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. CHARACTERISTICS NV10P - Manual

66 UE> Enable ON Enable UE> residual overvoltage element Start U E> U E U E>def U E U E>def U E>inv State State 1 U E> Curve T 0 t UE>RES t UE>RES T 0 t UE>def t UE>inv t UE> T 0 RESET U E>ST-K U E>ST-L U E>TR-K U E>TR-L TRIPPING MATRIX (LED+RELAYS) DDI state UE>>disbyCB_OPEN U E U E>inv (1 DDI closed) (1 upstream) 1 Trip U E> U E> Inhibition (ON Inhibit) 1 74VText. Logic INx t ON INx t OFF UE>BLK1 n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx Enable (ON Enable) Start U E> Trip U E> 74VT ext. Block1 U E> Block1 Logic INx t ON INx t OFF UE>BF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx BF Enable (ON Enable) Block1 input (ON Block) Trip U E> U E> BF Block1 towards BF logic Logic diagram concerning the first threshold (UE>) of the residual overvoltage element - 59N Fun-F59N_S1.ai For every of the two thresholds the logic block can be set. Logical block (Block1) If the UE>BLK1 and/or UE>>BLK1 enabling parameters are set to ON and a binary input is designed for logical block (Block1), the protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down. [1] The enabling parameters are available inside the Set \ Profile A(or B) \ Residual overvoltage - 59N \ UE> Element (UE>> Element) \ Setpoints menus, while the Block1 function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(2) menus (IN1 or IN2 matching). All the named parameters can be set separately for Profile A and Profile B). Note 1 The exhaustive treatment of the logical block (Block 1) function may be found in the Logic Block paragraph inside CONTROL AND MONITOR- ING section. 66 NV10P - Manual CHARACTERISTICS

67 TV downstream CB State t UE>> CB OPEN (52a=OFF) t UE>>= t cue>>def CB CLOSED (52a=ON) t atcue>>def t UE>>= t cue>>def t UE>>= t UE>>def (closing) DDI OFF->ON EnTcUE>>def U E>>def U E U E U E>>def DDI state UE>>disbyCB_OPEN (1 upstream) State (1 DDI closed) (1 upstream) t atcue>>def t cue>>def t UE>>def 0 1 t atcue>>def T 0 RESET 1 t UE>>RES t UE>>RES T 0 UE>disbyUE>> Start U E>> t UE>> T 0 RESET (ON Inhibit) Start U E>> UE> Inhibition U E>>ST-K U E>>ST-L U E>>TR-K U E>>TR-L TRIPPING MATRIX (LED+RELAYS) Trip U E>> 74VText. Logic INx t ON INx t OFF UE>>BLK1 n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx Enable (ON Enable) Start U E>> Trip U E>> 74VT ext. Block1 U E>> Block1 Logic INx t ON INx t OFF UE>>BF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx BF Enable (ON Enable) Block1 input (ON Block) Trip U E>> U E>> BF Block1 towards BF logic Logic diagram concerning the second threshold (UE>>) of the residual overvoltage element - 59N Fun-F59N_S2.ai CHARACTERISTICS NV10P - Manual

68 10000 t [s] t =t UE>inv t =t UE>inv 0.5 [(U E /U E>inv) - 1] 0.5 [(U EC /U E>inv) - 1] t UE>= 100 s 10 t UE>= 10 s 1 t UE>= 1 s 0.1 t UE>= 0.1 s U E /U E>inv U EC /U E>inv Note: match of operating and setting time takes place when U E /U E>inv = 1.5 or U EC /U E>inv = 1.5 Inverse time operating characteristic concerning the first threshold (UE>) of the residual overvoltage element - 59N F_59N-Char.ai 68 NV10P - Manual CHARACTERISTICS

69 Negative sequence overvoltage - 59V2 Preface The protection has an adjustable threshold and definite time characteristic. Enabling or disabling is provided by means ThySetter. Operation and settings The negative sequence voltage is calculated as: U 2=(U L1+e -j120 U L2+e +j120 U L3)/3 where U L1, U L2 and U L3 are the phase-ground for versions with inputs from electronic sensors, or U 2=(U 12+e -j120 U 23+e +j120 U 31)/3 where U 12, U 23 e U 31 are the voltages for versions with inputs from inductive VTs phase-to-phase, or by direct measurement of line voltages and with e -j120 =-1/2-j 3/2, e j120 =-1/2+j 3/2. For versions with voltage inputs from phase to earth measurement, the thresholds are expressed in pu E n, for versions with phase-to-phase inputs from inductive VTs or direct measurement, the thresholds are expressed in pu U n. The negative sequence voltage is compared with the threshold (U 2>def). A start is issued when the negative sequence voltage overcomes the adjustable threshold threshold (START). After expiry of the associated operate time (t U2>) a trip command is issued; if instead the voltages drops below the threshold, the element it is restored. The element can be enabled or disabled by setting ON or OFF the State parameter inside the Set \ Profile A(or B) \ Negative sequence overvoltage-59v2 \ U2> Element \ Definite time menu. The element can be disabled in the case of connection of the measuring inputs (TV or TV-I-NI) downstream of the Device Interface when the DI is open. The threshold disabling is selected by setting ON the U2>disbyCB_OPEN parameter, inside the Set \ Profile A(or B) \ Negative sequence overvoltage-59v2 \ U2> Element \ Setpoints menu. t TRIP t U2> def U2> def U 2 General operation time characteristic for the negative sequence overvoltage element - 59V2 State U 2> def t U2> def U 2 U2> Element Start U2> Trip U2> U2>BF Trip U2> U2>BF Block1 U2>BLK1 Start U2> BLK1U2> General characteristic for the negative sequence overvoltage element - 59V2 all-597v2.ai Breaker failure (BF) The negative sequence overvoltage element can produce the Breaker Failure output if the U2>BF parameter is set to ON. The parameter ia available inside the Set \ Profile A(or B) \ Negative sequence overvoltage - 59V2 \ U2> Element \ Setpoints menu. [1] All the parameters can be set separately for Profile A and Profile B. Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. CHARACTERISTICS NV10P - Manual

70 Logical block (Block1) If the U2>BLK1 enabling parameter is set to ON and a binary input is designed for logical block (Block1), the protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down. [1] The enabling parameter is available inside the Set \ Profile A(or B) \ Negative sequence overvoltage - 59V2 \ U2> Element \ Setpoints menu, while the Block1 function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching). Start U2> U 2 DDI state U2>disbyCB_OPEN U 2> def U 2 U 2> def (1 DDI closed) (1 upstream) State 1 t U2>def U2>def Tt 0 RESET U2>ST-K U2>ST-L U2>TR-K U2>TR-L Trip U2> TRIPPING MATRIX (LED+RELAYS) U2>BLK1 Enable (ON Enable) Start U2> Trip U2> BLK1U2> Block1 Logic INx t ON INx t OFF U2>BF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx BF Enable (ON Enable) Block1 input (ON Block) Trip U2> U2> BF Block1 towards BF logic Logic diagram concerning the threshold (U2>) of the negative sequence overvoltage element - 59V2 Fun-F59V2_S1.ai Note 1 The exhaustive treatment of the logical block (Block 1) function may be found in the Logic Block paragraph inside CONTROL AND MONITOR- ING section. 70 NV10P - Manual CHARACTERISTICS

71 Overfrequency - 81O Preface Two operation thresholds, independently adjustable (f>, f>>) with adjustable delay (t f>, t f>>) are provided. Each threshold may be separately enabled or disabled. The first threshold trip (f>) may be inhibited by start of the second threshold (f>>). Operation and settings The frequency, acquired from U L1, U L2, U L3 input voltages [1] is compared with the setting values (f>, f>>); a start is issued when the frequency overcomes the adjustable threshold (START); after expiry of the associated operate time (t f>, t f>>) a trip command is issued; if instead the frequency drops below the threshold, the element it is restored. When the frequency value is out of the lock range, it is fixed to the upper or lower limit (20 Hz or 90 Hz). Both elements operate with definite time characteristic. t t fdef> TRIP t fdef>> f > def f >> def f General operation time characteristic for the overfrequency elements - 81O t-int-f81o.ai Each element can be enabled or disabled by setting ON or OFF the State parameter inside the Set \ Profile A(or B) \ Overfrequency-81O \ f> Element (or f>> Element \ Definite time menu. State f>> def t f>>def State f> def t f>def f 2nd Pickup Element f >> Start f >> Trip f 1st Pickup Element f > Start f > Trip f>disbyf>> f >> Start ON=inhibit f> inhibition Block1 Block1 BF Block1 Block1 BF Logic diagram concerning the overfrequency elements - 81O all-f81o.ai The overfrequency protection is enabled only when the maximum of the input voltages U LMAX=max(U L1, U L2, U L3) overcomes 0.2 U n for a tfen adjustable time. Setting of the tfen value is available inside the Set \ Base menu with level 1 session. Timers-F81.ai Max (U L1...U L3) 0.20 U n t dfen 81O-81U Enable 81O-81U disabled 81O-81U enabled 81O-81U disabled Overfrequency underfrequency enable timer t The first threshold trip (f>) may be inhibited by start of the second threshold (f>>) by setting ON the f> Disabling by f>> start (f>disbyf>>) parameter available inside the Set \ Profile A(or B) \ Overfrequency-81O \ f>> Element \ Setpoints menu. The elements can be disabled in the case of connection of the measuring inputs (TV or TV-I-NI) downstream of the Device Interface when the DI is open. The threshold disabling is selected by setting ON the f>disbycb_open, f>>disbycb_open parameters, inside theset \ Profile A(or B) \ Overfrequency-81O \ Setpoints menu. Note 1 For sensors inputs versions the frequency is measured on the phase voltages (U L1, U L2, U L3), while for versions with inductive VTs inputs the frequency is measured on-phase-to-phase voltages (U 12, U 23, U 31). On the diagrams U L1, U L2, U L3 are the input phase voltages or phase-to-phase according to the corresponding versions CHARACTERISTICS NV10P - Manual

72 When the CB closes, the operate time of the f>> element is automatically adjusted to a reduced value tcf>>def for an adjustable time tatcf>>def. The reduction of the operate time for the second threshold can be selected by setting the EnTcf>>def parameter inside the Set \Profile A(or B) \ Overfrequency-81O \ f>> Element \ Setpoints menu, while the timers are adjustable inside the Set \Profile A(or B) \ Overfrequency-81O \ f>> Element \ Definite time menu. f 1...f 3 U L1,U L2,U L3 Max(U L1...U L3) 20%U n f>blk1 Block1 f> inhibition DDI state f>disbycb_open Enable (ON Enable) Logic Max(f 1...f 3) INx t ON (1 DDI closed) (1 upstream) INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx f f> def (ON Inhibit) Logic diagram concerning the first threshold (f>) of the overfrequency element - 81O f> def 1 f>bf f> Start f> Trip Block1 input (ON Block) BF Enable (ON Enable) t f> T 0 RESET Fun-F81O_S1-cei.ai Breaker failure (BF) Both overfrequency elements (f>, f>>) can produce the Breaker Failure output if the f>bf and f>>bf parameters are set to ON. The parameters are available inside the Set \ Profile A(or B) \ Overfrequency - 81O \ f> Element (f>> Element) \ Setpoints menus. [1] Logical block (Block1) If the f>blk1 and/or f>>blk1 enabling parameters are set to ON and a binary input is designed for logical block (Block1), the protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down. [2] The enabling parameters are available inside the Set \ Profile A(or B) \ Overfrequency - 81O \ f> Element (f>> Element) \ Setpoints menus, while the Block1 function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x2) menus (IN1 or INx matching). f> Trip t f>def f> Start f> BF f>st-k f>st-l f>tr-k f>tr-l f> Trip f> Block1 Block1 TRIPPING MATRIX (LED+RELAYS) towards BF logic DDI OFF->ON f 1...f 3 U L1,U L2,U L3 Max(U L1...U L3) 20%U n f>>blk1 DDI state EnTcf>>def f>>disbycb_open (closing) Max(f 1...f 3) Enable (ON Enable) (1 upstream) t atcf>>def 0 T RESET (1 DDI closed) (1 upstream) t atcf>>def t cf>>def t f>>def 0 1 f >> def f f>> def 1 f>> Start f>> Trip f>> Start CB State t f>> t f>> T 0 RESET CB OPEN (52a=OFF) t f>>= t cf>>def TV downstream CB CLOSED (52a=ON) t atcf>>def t f>>= t cf>>def f>>st-k f>>st-l f>>tr-k f>>tr-l f>> Trip t f>>= t f>>def f>> Block1 TRIPPING MATRIX (LED+RELAYS) Block1 Logic INx t ON INx t OFF n.c. INx t ON INx t OFF Block1 input (ON Block) n.o. T 0 0 T f>> Trip Binary input INx BF Enable (ON Enable) f>>bf Logic diagram concerning the second threshold (f>>) of the overfrequency element - 81O f>> BF Block1 towards BF logic Fun-F81O_S2-cei.ai Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. Note 2 The exhaustive treatment of the logical block (Block 1) function may be found in the Logic Block paragraph inside CONTROL AND MONITOR- ING section. 72 NV10P - Manual CHARACTERISTICS

73 Underfrequency - 81U Preface Four operation thresholds, independently adjustable (f<, f<<, f<<<, f<<<<) with adjustable delay (t f<, t f<<, t f<<<, t f<<<<) are provided. Each threshold may be separately enabled or disabled. Operation and settings The frequency, acquired from U L1, U L2, U L3 input voltages [1] is compared with the setting values (f<, f<<, f<<<, f<<<<); a start is issued when the frequency overcomes the adjustable threshold (START); after expiry of the associated operate time (t f<, t f<<, t f<<<, t f<<<<) a trip command is issued; if instead the frequency drops below the threshold, the element it is restored. When the frequency value is out of the lock range, it is fixed to the upper or lower limit (20 Hz or 90 Hz). All elements operate with definite time characteristic. t t fdef< t fdef<< TRIP t fdef<<< t fdef<<<< f<<<< def f<<< def f<< def f< def f General operation time characteristic for the underfrequency elements - 81U Each element can be enabled or disabled by setting ON or OFF the State parameter inside the Set \ Profile A(or B) \ Underfrequency-81U \ f< Element (f<< Element, f<<< Element, f<<<< Element) \ Definite time menu. State f<<<< t f<<<< State f<<< t f<<< f 4th Pickup Element f<<< Start f<<<disbyf<<<< f<<< Trip f<<<< Start ON=inhibit f 3rd Pickup Element f<<< Start f<<< Trip f<<< inhibition f<<disbyf<<<< f<<disbyf<<< f<<<< Start f<<< Start f<disbyf<<<< f<disbyf<<< f<<<< Start f<<< Start Block1 Block1 Block1 Block1 BF BF State f<< t f<< State f< t f< f 2nd Pickup Element f<< Start f<< Trip f 1st Pickup Element f< Start f< Trip f<disbyf<< f<< Start ON=inhibit f< inhibition ON=inhibit f<< inhibition Block1 Logic diagram concerning the underfrequency elements - 81U all-f81u.ai Note 1 For sensors inputs versions the frequency is measured on the phase voltages (U L1, U L2, U L3), while for versions with inductive VTs inputs the frequency is measured on-phase-to-phase voltages (U 12, U 23, U 31). On the diagrams U L1, U L2, U L3 are the input phase voltages or phase-to-phase according to the corresponding versions Block1 BF Block1 Block1 BF CHARACTERISTICS NV10P - Manual

74 The underfrequency protection is enabled only when the maximum of the input voltages U LMAX=max(U L1, U L2, U L3) overcomes 0.2 U n for a tfen adjustable time. Setting of the tfen value is available inside the Set \ Base menu with level 1 session. Max (U L1...U L3) 0.20 U n Timers-F81.ai The trip of f< element may be inhibited by the start of the second, third and/or fourth element (f<<, f<<<, f<<<<) by setting ON the Disable f< by start f<<, Disable f< by start f<<<, Disable f< by start f<<<< (f<disbyf<<, f<disbyf<<<, f<disbyf<<<<) parameters available inside the Set \ Profile A(or B) \ Underfrequency-81U \ f<< Element (f<<< Element,f<<<< Element) \ Setpoints menus. Similarly the trip of the: f<< element may be inhibited by start of the third and/or fourth element (f<<< and/or f<<<<) by setting ON the Disable f<< by start f<<<, start f<<<< (f<<disbyf<<<, f<<disbyf<<<<) parameter available inside the Set \ Profile A(or B) \ Underfrequency-81U \ f<<< Element, (f<<<< Element) \ Setpoints menus. f<<< element may be inhibited by start of the fourth element (f<<<<) by setting ON the Disable f<<< by start f<<<< (f<<<disbyf<<<<) parameter available inside the Set \ Profile A(or B) \ Underfrequency-81U \ f<<<< Element \ Setpoints menu. t dfen 81O-81U Enable 81O-81U disabled 81O-81U enabled 81O-81U disabled Overfrequency underfrequency enable timer The elements can be disabled in the case of connection of the measuring inputs (TV or TV-I-NI) downstream of the Device Interface when the DI is open. The threshold disabling is selected by setting ON the f<disbycb_open, f<<disbycb_open, f<<<disbycb_open, f<<<<disbycb_open parameters, inside theset \ Profile A(or B) \ Underfrequency-81U \ Setpoints menu. When the CB closes, the operate time of the f<< element is automatically adjusted to a reduced value tcf<<def for an adjustable time tatcf<<def. The reduction of the operate time for the second threshold can be selected by setting the EnTcf<<def parameter inside the Set \Profile A(or B) \ Underfrequency-81U \ f<< Element \ Setpoints menu, while the timers are adjustable inside the Set \Profile A(or B) \ Underfrequency-81U \ f<< Element \ Definite time menu Logical block (Block1) If the f<blk1, f<<blk1, f<<<blk1 and/or f<<<<blk1 enabling parameters are set to ON and a binary input is designed for logical block (Block1), the protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down. [1] The enabling parameters are available inside the Set \ Profile A(or B) \ Underfrequency - 81U \ f< Element (f<< Element, f<<< Element, f<<<< Element) \ Setpoints menus, while the Block1 function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching). t f< def f< Start f 1...f 3 Min(f 1...f 3) f < f< def U L1,U L2,U L3 Max(U L1...U L3) 20%U n f< inhibition (ON Inhibit) DDI state (1 DDI closed) f<disbycb_open (1 upstream) f<blk1 Enable (ON Enable) 1 f< Start f< Trip t f<def t f<def T 0 RESET f<st-k f<st-l f<tr-k f<tr-l f< Trip Block1 TRIPPING MATRIX (LED+RELAYS) Block1 Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx f<bf Block1 input (ON Block) BF Enable (ON Enable) f< Trip f< BF f< Block1 towards BF logic Logic diagram concerning the first threshold (f<) of the underfrequency element - 81U Fun-F81U_S1.ai Note 1 The exhaustive treatment of the logical block (Block 1) function may be found in the Logic Block paragraph inside CONTROL AND MONITOR- ING section. 74 NV10P - Manual CHARACTERISTICS

75 TV downstream CB State CB OPEN (52a=OFF) CB CLOSED (52a=ON) t atcf<<def t f<< t f<<= t cf<<def t f<<= t cf<<def t f<<= t f<<def t atcf<<def t cf<<def t f<<def 0 1 DDI OFF->ON EnTcf<<def (closing) (1 upstream) Tt atcf<<def 0 RESET f<disbyf<< f< inhibition f<< Start f 1...f 3 f<< def Min(f 1...f 3) f f<< def U L1...U L3 Max(U L1...U L3) 20%U n From 3rd and/or 4th element f<< inhibition (ON Inhibit) DDI state (1 DDI closed) (1 upstream) 1 f<<disbycb_open f<< Start t f<< T 0 RESET f<<st-k f<<st-l f<<tr-k f<<tr-l f<< Trip TRIPPING MATRIX (LED+RELAYS) f<<blk1 Enable (ON Enable) f<< Start f<< Trip f<< Block1 Block1 Logic INx t ON INx t OFF f<<bf n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx BF Enable (ON Enable) Block1 input (ON Block) f<< Trip f<< BF Block1 towards BF logic Logic diagram concerning the second threshold (f<<) of the underfrequency element - 81U Fun-F81U_S2.ai f<disbyf<<< (ON Inhibit) f< inhibition f<<disbyf<<< (ON Inhibit) f<< inhibition f<<< def f<<< Start f 1...f 3 Min(f 1...f 3) U L1,U L2,U L3 Max(U L1...U L3) 20%U n f<<< inhibition DDI state f<<<disbycb_open Enable (ON Enable) f<<<blk1 f < f<<< def (ON Inhibit) (1 DDI closed) (1 upstream) 1 f<<< Start f<<< Trip t f<<< def Tt f<<< def 0 RESET f<<<st-k f<<<st-l f<<<tr-k f<<<tr-l f<<< Trip f<<< Block1 TRIPPING MATRIX (LED+RELAYS) Block1 Logic INx t ON INx t OFF f<<<bf n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx BF Enable (ON Enable) Block1 input (ON Block) f<<< Trip f<<< BF Block1 towards BF logic Logic diagram concerning the third threshold (f<<<) of the underfrequency element - 81U Fun-F81U_S3.ai CHARACTERISTICS NV10P - Manual

76 f<disbyf<<<< (ON Inhibit) f< inhibition f<<disbyf<<<< (ON Inhibit) f<< inhibition f<<<disbyf<<<< (ON Inhibit) f<<< inhibition f<<<< def f<<<< Start f 1...f 3 Min(f 1...f 3) f < f<<<< def U L1,U L2,U L3 Max(U L1...U L3) 20%U n DDI state (1 DDI closed) f<<<disbycb_open (1 upstream) 1 t f<<<< def t f<<<< def 0 T RESET f<<<<st-k f<<<<st-l f<<<<tr-k f<<<<tr-l f<<<< Trip TRIPPING MATRIX (LED+RELAYS) f<<<<blk1 Enable (ON Enable) f<<<< Start f<<<< Trip f<<<< Block1 Block1 Logic INx t ON INx t OFF f<<<<bf n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx BF Enable (ON Enable) Block1 input (ON Block) f<<<< Trip f<<<< BF Block1 towards BF logic Logic diagram concerning the fourth threshold (f<<<<) of the underfrequency element - 81U Fun-F81U_S4.ai 76 NV10P - Manual CHARACTERISTICS

77 Application notes about over-under frequency elements - 81U and 81O To ensure compliance with CEI 0-16 italian standard the voltage enabling function is provided through which the first threshold can be enable / disable, respectively, in the absence / presence of the signal integrity of the communication network Distributor (digital input set with inverse logic and f <-f> Control function or communication interface protocol IEC 61850). For the trip of the first threshold of each element can be enabled by one or more of the following consensus: start of residual current second threshold (59N internal element by programming ON the f<ue>>, f>ue>> parameter) start of residual voltage second threshold (59N external element) acquired by means of binary input programmed as f<-f> Control (setting ON the f<digin, f>digin parameter) loss of communication network acquired by means of binary input programmed as f<-f> Control with inverse logic (setting ON the f<digin, f>digin parameter) start of positive sequence undervoltage threshold (27V1 programming ON the f<27v1, f>27v1 parameter) start of negative sequence overvoltage threshold (59V2 programming ON the 59V2 (programming ON the f<59v2, f>59v2 parameter) start of first threshold of the undervoltage element (27 programming ON the f<u<, f>u< parameter) loss of communication network from Goose IEC message programming ON the f<rete61850-ko, f>rete61850-ko parameter. The parameters listed above are available in the menus inside the menu Set \ Profile A(or B) \ Underfrequency - 81U \ f< element \ Voltage control for parameters concerning to the underfrequency element (81U) and within the Set \ Profile A(or B) \ Overfrequency - 81O \ f> element \ Voltage control menu for parameters concerning to the overfrequency element (81O). t (s) permissive thresholds f (Hz) f < 47,5 Hz f > 51,5 Hz Delayed trip 4.0 s Delayed trip 1.0 s << 81>> with fault f (Hz) f < 49,8 Hz f > 50,2 Hz or t (s) restrictive thresholds V0> threshold Delayed trip 0.1 s 81< 81> V Vi > threshold Vd< threshold or without fault f (Hz) ON = Fault (Start 59N and/or 27V1 and/or 59V2 element) Operating logic for thresholds activation with voltmetric control CHARACTERISTICS NV10P - Manual

78 U 12, U 23, U 31 directly measured phase-to-phase voltages for VTs input versions or calculated for sensors input versions U< def U 12ORU 23ORU 31< U< def t U<def t U<def T 0 U<< def t U<<def U 12ORU 23ORU 31< U<< def Tt U<<def 0 U > avg t Uavg> U 12avgORU 23avgORU 31avg U > avg T t Uavg> 0 U >> def t U>>def U 12, U 23, U 31 directly measured phase-to-phase voltages for VTs input versions or U L1, U L2, U L3 phase-to-ground voltages for sensors input versions U 12ORU 23ORU 31 U >> def f >> def f f>> def f<< def f < f<< def f> def f f> def f< def T t U>>def 0 t f>def t f>def T 0 t f<<def t f<<def T 0 t f>def t f>def T 0 t f<def OPEN CB COMMAND f < f< def t f<def T 0 U E directly measured residual voltage for VTs input versions or U EC calculated for sensors input versions 81O-81U first threshold enabling logic (see following page) f> Control f< Control t UE>>def Tt UE>>def 0 Trip U E>> Remote trip Remote trip Binary input connected to remote trip external contact Remote trip (Goose IEC61850) Logic diagram concerning the NV10P voltage control 78 NV10P - Manual CHARACTERISTICS

79 U 12, U 23, U 31 directly measured phase-to-phase voltages for VTs input versions or calculated for sensors input versions U 2 > def U 2 U 2 def f>59v2 f<59v2 Virtual input 59V2 f<59v2 f>59v2 U 1< def f>27v1 U 1 < U 1 def f<27v1 Virtual input 27V1 f<27v1 f>27v1 f > f> Control UE>> Virtual input U< def f<ue>> f>ue>> f<u< f > RES > RES 0f T f< RES 0f< RES T f>-k f>-l f<-k f<-l TRIPPING MATRIX (LED+RELAYS) U 12ORU 23ORU 31< U< def f>u< f< f< Control U E directly measured residual voltage for VTs input versions or U EC calculated for sensors input versions U E >> def U E U E >> def timer Trip U E>> t UE>>RES t UE>>RES T 0 Eventual restrictive thresholds enabled from external contact 59N starting Consenso f<-f> Segnale esterno Logic n.c. n.o. IN2 t ON IN2 t ON T 0 0 Binary input IN2 IN2 t OF F IN2 t OFF f<digin f>digin Consenso f<-f> Segnale esterno (Presenza Goose IEC61850) f<rete61850-ko f>rete61850-ko Logic diagram concerning the 81O-81U threshold enabling (see previous page) CHARACTERISTICS NV10P - Manual

80 Frequency rate of change - 81R Preface Fast trips may be issued when positive/negative or any (module) changes in frequency are detected. The 81R element is faster than underfrequency and overfrequency protections. Four operation thresholds, independently adjustable with adjustable delay are provided. Each threshold may be separately enabled or disabled. Operation and settings The frequency rate of change, acquired from U L1 [1] input voltage, is compared with the setting values (df>, df>>, df>>>, df>>>>); a start is issued when the frequency overcomes the adjustable threshold (START); after expiry of the associated operate time (t df>, t df>>, t df>>>, t df>>>>) a trip command is issued; if instead the frequency rate of change drops below the threshold, the element it is restored. When the frequency value is out of the lock range, it is fixed to the upper or lower limit (20 Hz or 90 Hz). All elements operate with definite time characteristic. t dt fdef> TRIP dt fdef>> dt fdef>>> dt fdef>>>> df> def df>> def df>>> def df>>>> def df General operation time characteristic for the frequency rate of change elements - 81R t-int-f81r.ai The frequency rate of change protection is enabled only when the maximum of the U L1 input voltage overcomes 0.2 U n for a tfen adjustable time. Setting of the tfen value is available inside the Set \ Base menu with level 1 session. U L U n t dfen 81R Enable 81R disabled 81R enabled 81R disabled Frequency rate of change enable timer - 81R t Timers-F81R.ai Each element can be enabled or disabled by setting ON or OFF the State parameter inside the Set \ Profile A(or B) \ Frequency rate of change-81r \ df> Element (df>> Element, df>>> Element, df>>>> Element) \ Definite time menu. For every threshold the positive/negative or module of frequency change cam be selected (typically for speedup/slowdown or any speed change of the generator; the df operating mode can be set (Mode-df>, Mode-df>>, Mode-df>>>, Mode-df>>>>) inside the Set \ Profile A(or B) \ Frequency rate of change-81r \ df> Element (df>> Element, df>>> Element, df>>>> Element) \ Setpoints menu. The trip of df> element may be inhibited by the start of the second, third and/or fourth element (df>>, df>>>, df>>>>) by setting ON the Disable df> by start df>>, Disable df> by start df>>>, Disable df> by start df>>>> (df>disbydf>>, df>disbydf>>>, df>disbydf>>>>) parameters available inside the Set \ Profile A(or B) \ Frequency rate of change-81r \ df>> Element (df>>> Element, df>>>> Element) \ Setpoints menus. Similarly the trip of the: df>> element may be inhibited by start of the third and/or fourth element (df>>> and/or df>>>>) by setting ON the Disable df>> by start df>>>, start df>>>> (df>>disbydf>>>, df>>disbydf>>>>) parameter available inside the Set \ Profile A(or B) \ Frequency rate of change-81r \ df>>> Element, (df>>>> Element) \ Setpoints menus. Note 1 For sensors inputs versions the frequency is measured on the phase voltageu L1, while for versions with inductive VTs inputs the frequency is measured on-phase-to-phase voltage U 12 On the diagrams U L1, U L2, U L3 are the input phase voltages or phase-to-phase according to the corresponding versions 80 NV10P - Manual CHARACTERISTICS

81 df>>> element may be inhibited by start of the fourth element (df>>>>) by setting ON the Disable df>>> by start df>>>> (df>>>disbydf>>>>) parameter available inside the Set \ Profile A(or B) \ Frequency rate of change-81r \ df>>>> Element \ Setpoints menu. The elements can be disabled in the case of connection of the measuring inputs (TV or TV-I-NI) downstream of the Device Interface when the DI is open. The threshold disabling is selected by setting ON the df>disbycb_open, df>>disbycb_open, df>>>disbycb_open, df>>>>disbycb_ OPEN parameters, inside the Set \ Profile A(or B) \ Frequency rate of change-81r \ df> Element (df>> Element, df>>> Element, df>>>> Element) \ Setpoints menu. For every of the four thresholds the logic block can be set. Logical block (Block1) If the df>blk1, df>>blk1, df>>>blk1 and/or df>>>>blk1 enabling parameters are set to ON and a binary input is designed for logical block (Block1), the protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down. [1] The enabling parameters are available inside the Set \ Profile A(or B) \ Frequency rate of change-81r\ df> Element (df>> Element, df>>> Element, df>>>> Element) \ Setpoints menus, while the Block1 function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching). State df>>>> t df>>>> State df>>> t df>>> f 4th Pickup Element df>>>>start df>>>disbydf>>>> df>>>>trip df>>>>start ON=inhibit f 3rd Pickup Element df>>> Start df>>>trip df>>> inhibition df>>disbydf>>>> df>>disbydf>>> df>>>>start df>>> Start df>>disbydf>>>> df>disbydf>>> df>>>>start df>>> Start Block1 Block1 Block1 Block1 BF BF State df>> t df>> State df> t df> f 2nd Pickup Element df>> Start df>>trip f 1st Pickup Element df> Start df>trip df>disbydf>> df>> Start ON=inhibit df> inhibition ON=inhibit df>> inhibition Block1 Block1 BF Block1 Block1 BF Logic diagram concerning the frequency rate of change elements - 81R all-f81r.ai All the parameters can be set separately for Profile A and Profile B. Note 1 The exhaustive treatment of the logical block (Block 1) function may be found in the Logic Block paragraph inside CONTROL AND MONITOR- ING section. CHARACTERISTICS NV10P - Manual

82 df> Start df > def f df df df > def 1 df -df > def 16 f 80 Hz U L1 U L1 20%U n From 2nd, 3rd and/or 4th element df> inhibition DDI state (1 DDI closed) df>disbycb_open (1 upstream) df>blk1 Enable (ON Enable) A Positive Mode-df B Module A C Negative B C (ON Inhibit) 1 df> Start df> Trip t df>def t df>def T 0 RESET df>st-k df>st-l df>tr-k df>tr-l df> Trip Block1 TRIPPING MATRIX (LED+RELAYS) Block1 Logic INx t ON INx t OFF df>bf n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx BF Enable (ON Enable) Block1 input (ON Block) df> Trip df> BF df> Block1 towards BF logic Logic diagram concerning the first threshold (df>) of the frequency rate of change element - 81R Fun-F81R_S1.ai f df 16 f 80 Hz U L1 U L1 20%U n From 3rd and/or 4th element DDI state df>>disbycb_open df >> def df df >> def 1 df -df >> def df>> inhibition (1 DDI closed) (1 upstream) Mode-df A B C (ON Inhibit) 1 d f>disbydf>> A Positive B Module C Negative (ON Inhibit) t df>>def df>>def Tt 0 RESET d f> inhibition df>> Start df>>st-k df>>st-l df>>tr-k df>>tr-l df>> Trip TRIPPING MATRIX (LED+RELAYS) df>>blk1 Enable (ON Enable) df>> Start df>> Trip df>> Block1 Block1 Logic INx t ON INx t OFF d f>> BF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx BF Enable (ON Enable) Block1 input (ON Block) f<< Trip df>> BF Block1 towards BF logic Logic diagram concerning the second threshold (df>>) of the frequency rate of change element - 81R Fun-F81R_S2.ai 82 NV10P - Manual CHARACTERISTICS

83 d f>disbyd f>>> (ON Inhibit) d f> inhibition d f>>disbyd f>>> (ON Inhibit) d f>> inhibition df >>> def f df df df >>> def 1 df -df >>> def 16 f 80 Hz U L1 U L1 20%U n From 4th element df>>> inhibition DDI state (1 DDI closed) df>>>disbycb_open (1 upstream) df>>>blk1 Enable (ON Enable) Mode-df A B C (ON Inhibit) 1 A Positive B Module C Negative d f>>> Start d f>>> Trip t df>>> def t df>>> def T 0 RESET df>>> Start d f>>>st-k d f>>>st-l d f>>>tr-k d f>>>tr-l df>>> Trip df>>> Block1 TRIPPING MATRIX (LED+RELAYS) Block1 Logic INx t ON INx t OFF n.c. INx t ON INx t OFF Block1 input (ON Block) n.o. T 0 0 T Binary input INx d f>>>trip BF Enable (ON Enable) d f>>>bf Logic diagram concerning the third threshold (df>>>) of the frequency rate of change element - 81R df>>> BF Block1 towards BF logic Fun-F81R_S3.ai d f>disbyd f>>>> (ON Inhibit) d f> inhibition d f>>disbyd f>>>> (ON Inhibit) d f>> inhibition d f>>>disbyd f>>>> (ON Inhibit) d f>>> inhibition df >>>> def f df df df >>>> def 1 df -df >>>> def 16 f 80 Hz U L1 U L1 20%U n DDI state (1 DDI closed) df>>>disbycb_open (1 upstream) df>>>>blk1 Enable (ON Enable) Mode-df A B C 1 A Positive B Module C Negative df>>>> Start df>>>> Trip t df>>>> def t df>>>> def T 0 RESET df>>>> Start d f>>>>st-k d f>>>>st-l d f>>>>tr-k d f>>>>tr-l df>>>> Trip df>>>> Block1 TRIPPING MATRIX (LED+RELAYS) Block1 Logic INx t ON INx t OFF n.c. INx t ON INx t OFF Block1 input (ON Block) n.o. T 0 0 T Binary input INx df>>>> Trip BF Enable (ON Enable) f<<<< BF d f>>>>bf Logic diagram concerning the fourth threshold (df>>>>) of the frequency rate of change element - 81R Block1 towards BF logic Fun-F81R_S4.ai CHARACTERISTICS NV10P - Manual

84 Breaker failure - BF Preface When the protection issues a trip command but, because an anomaly, the circuit breaker cannot open, the breaker failure protection issues a back-up trip command to trip adjacent circuit breakers. The breaker failure function may be started by internal protective function (if associated with BF) or by external protections. Operation and settings The starting of the timer occurs if both the following conditions are filled: 1) Start and trip of internal protective elements (trip of elements matched with BF protection) or, trip of external protections acquired by means binary input or, if enabled, the remote trip command. 2) The CB is closed (the CB state may be acquired by means one [1] or two binary inputs connected to the auxiliary contacts 52a and 52b). If both conditions are held along the set operate time t BF, the BF element trips at deadline, vice versa the timer is cleared and the function is restored. To the purpose to restore the BF element as quickly as possible, with start of the same protection (see A condition), additionally to the trip of some internal protections, their starts are required (start reset is faster than trip reset). The element may be enabled or disabled by setting ON the BF Enable parameter available inside the Set \ Profile A(or B) \ Breaker failure-bf menu. BF Enable t BF 52a/52b Trip ProtExt Trip BF Start BF Block1 BF-BLK1 Block1 BLK1 BF General logic diagram of the breaker failure element - BF all-fbf.ai If two binary inputs are designed for acquire the 52a and 52b auxiliary contacts [2], the control of the CB position is enabled. The 52a and 52b function must be assigned to the selected binary inputs inside Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching). To enable the breaker failure protection to operate with trips coming from external protections, one binary input must be designed to acquire the relative contacts. The TripProtExt function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus (IN1 or IN... matching). The t BF parameter, available inside the Set \ Profile A(or B) \ Breaker failure-bf menu, may be adjusted separately for Profile A and Profile B. Logical block (Block1) If the BF-BLK1 parameter (BF logical block) is set to ON, and a binary input is designed for logical block (Block1), the breaker failure protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down. [3] The enabling parameter is available inside the Set \ Profile A(or B) \ Breaker failure-bf menu, while the Block1 function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching). Note 1 Both auxiliary contact state 52a and 52b must be acquired (two binary inputs are required) with Fw version previous to 1.60; with later versions, giving up an inconsistency occurs, one logical input for the acquisition of a contact (52nd or 52b ) may suffice Note 2 Both auxiliary contact state 52a and 52b must be acquired (two binary inputs are required) with Fw version previous to 1.60; with later versions, giving up an inconsistency occurs, one logical input for the acquisition of a contact (52nd or 52b ) may suffice Note 3 The exhaustive treatment of the logic block (Block 1) function may be found in the Logic Block paragraph inside CONTROL AND MONITORING section 84 NV10P - Manual CHARACTERISTICS

85 52a Logic INx t ON INx t OFF 52b n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx 52a 52b ON CB Closed t BF tbf T RESET 0 BF-ST-K BF-ST-L Start BF BF-TR-K BF-TR-L Start BF TRIPPING MATRIX (LED+RELAYS) Trip ProtExt Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx 1 Trip BF Trip BF Trip Int/Ext Trip int-prot Trip of enabled protective elements (ON Trip) RemTrBF Remote trip BF-BLK1 Remote trip (ON Remote trip) Block1 enable (ON Enable) Start BF Trip BF BLK1 BF Block1 Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx (x= ) Block1 input (ON Block) Block1 Logic diagram concerning the breaker failure element -BF Fun-BF_Pro-n.ai CHARACTERISTICS NV10P - Manual

86 4.5 CONTROL AND MONITORING Logical block - BLOCK1 To the purpose to block off the trip of one protection element, the logical block function (Block1) may be matched with binary inputs. [1] The binary-matching may be set inside the Inputs submenu; to the purpose the Block1 parameter must be selected for INx matching (x=1, 2) A protective element, where the logical block is enabled, is blocked off whenever the given input is ON. For a given protective element, the logical block state is reading available (ThySetter and communication interfaces); it is ON the following condition are at the same time observed: Binary input ON, Element start ON, Element Trip OFF. Input Measure Threshold Generic protective element Operate time Operate time T 0 RESET Start Trip TRIPPING MATRIX (LED+RELAYS) xxxblk1 Enable (ON Enable) Start Trip Customized Block1 info BLK1xxx Block1 Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx Block1 input (ON Block) Block1 info (internal state) Block1 Schema funzionale relativo al blocco logico - Block1 Blocco_L.ai The logical block it is not liable for any inhibition time-out, so the protective element is disabled for the whole time when the input is ON. [2] Start Operate time Trip Block1 (input) Block1 (output) Logic block timers - Block1 t Timers-Block1.ai CAUTION Activation of any binary input assigned ti logic block (Block1) function effects a block of all the protective elements where the logic block is enabled Note 1 In the following treatment, the logical block is defined as Logical block or Block1 Note 2 The Block 1 signal forces a timer reset 86 NV10P - Manual CHARACTERISTICS

87 U<BLK1 27 element U<<BLK1 27 element U1<BLK1 27V1 element U>BLK1 59 element U>>BLK1 59 element Uavg>BLK1 59Uavg element UE>BLK1 59N element xxxblk1 Block1 Enable (ON Enable) Logic INx t ON INx t OFF Start Trip Reset timers (ON element inhibition) Customized Block1 info UE>>BLK1 U2>BLK1 f>blk1 f>>blk1 f<blk1 f<<blk1 59N element 59V2 element 81O element 81O element 81U element 81U element n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx f<<<blk1 f<<<<blk1 df>blk1 81U element 81U element 81R element df>>blk1 81R element df>>>blk1 81R element df>>>>blk1 81R element 74TCSBLK1 74TCS element BFLK1 BF element Logic diagram concerning the logic block element -Block1 Block1 Block1 info (internal state) Block1_L.ai CHARACTERISTICS NV10P - Manual

88 Virtual I/O with Ethernet messages Eight outputs (Virtual Output - VOUT1... 8) and ten virtual inputs (Virtual Inputs - VIN1... VIN10) may be defined using RPC or IEC communication protocols over Ethernet network. Over Pro-N relay the virtual I / O can be usefully employed for: 1) Transmit information between protections installed in significant distance where the traditional connections are critical in terms of reliability. One application is proposed in which the measurement of residual voltage, not being available on the interface relay (high distance from NV10P relay and VTs installed in MV), is transmitted as start and trip signals by another relay (S1) to the interface relay (S2). 2) Making OR logic for opening control of multiple DDI (simultaneous control of all DDI operated by each SPI) in cases of multiple interface protections (Smart Grids). Example 1 The diagram shows a solution that uses relays, logic inputs and connections pilot wires to transmit 59N start and trip information to the interface relay (S2) from a relay (S1) installed in MV.. L1 L2 L3 A 59N external protection +U AUX N dn da Raf(*) B7 B8 U E OUTPUT RELAYS K1 K2 A3 A4 A5 A6 A7 A8 TRIP - UE>> +U AUX START UE>> (59N) (*) Raf - antiferroresonance Distance from VT to NV10P considered excessive NV10P Trip DI (K1) DI -U AUX G ~ -UAUX +U AUX -U AUX B1 B2 B3 B4 B5 B6 A19 A20 A1 A2 U L1 U L2 U L3 Consenso f<-f> IN1 U AUX K1 K2 K3 K4 K5 K6 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 Trip - DI Phase-to-phase voltage measurement input with direct connection in the LV side (UR = 400 V versions) with 59N detection and processing by means of the device away from the NV10P relay and transmission of 59N start via a digital signal connected to IN1 input of NV10P 88 NV10P - Manual CHARACTERISTICS

89 Alternatively to the method where relays, logic inputs and connections pilot wires are employed to transmit the information of 59N start and trip between the relays S1 and S2, the diagram below shows the solution that utilizes the I / O virtual circuitry by means of messages on Ethernet network.. NV10P PROTECTION RELAY VOUT1 START UE>> VOUT2 TRIP - UE>> IP: D1 S1 START - UE>> TRIP - UE>> Ethernet NV10P PROTECTION RELAY DDI UE>> (Abilita f<,f>) Remote trip VIN1 VIN2 D1 START - UE>> TRIP - UE>> IP: S2 S1 outputs Two outputs are programmed as: VOUT1, used in the example as start signal of the second threshold of 59N protection of S1 (Start UE>>) in order to activate the first threshold of minimum and maximum frequency (restrictive thresholds) of the S2 protection VOUT2, used in Example as trip signal of the second threshold of 59N protection of S1 (Trip UE>>) in order to control the opening of the interface device by means of remote tripping of the S2 protection. The outputs are activated by the input signal (UE >> start and / or remote trip) and stay active (also in case of drop of the input signal) for the duration of an adjustable time (t V and t Trip). Input signal over the threshold Start voltage protection or remote trip with tv and ttrip = 0 Start voltage protection or remote trip with tv and ttrip 0 Virtual output (VOUT1...VOUT8) tv and ttrip tv and ttrip t S2 inputs For each of the eight virtual inputs one function may be associated that can be activated by the selected input; in the example the enable of the first threshold of under and over frequency is programmed when an earth fault in MT arises (UE>> start active on the S1 protection) at the input virtual VIN1 and remote trip connected to the VIN2 virtual input of the S2 protection relay. Links (virtual pilot wires) After defining the input and output circuits the virtual links must be created. A unique IP address for each relay must be assigned CHARACTERISTICS NV10P - Manual

90 Example 2 The diagram shows the traditional solution that uses relays, logic inputs and pilot wires connections to realize the logical OR for the opening command of two DDI (simultaneous control of both DDI operated by each interface relay). The logical OR is realized driving each circuit breaker by the series connection of two output relays (a relay for each CB); can easily understand the added complication for implementation of the logic when further protection interfaces are mounted, (in addition the need to implement the logic concerning the measurement of residual voltage, as described in Example 1, must be considered). NV10P Trip - DI-A Trip - DI-A U L1 U L2 U L3 K1 K2 A3 A4 A5 A6 A7 A8 +U AUX DI-A -U AUX +U AUX -U AUX A19 A20 A1 A2 IN1 U AUX RELE FINALI K3 K4 K5 K6 A9 A10 A11 A12 A13 A14 NV10P Trip - DI-B U L1 U L2 U L3 K1 K2 A3 A4 A5 A6 A7 A8 +U AUX Trip - DI-B DI-B -U AUX ~ ~ +U AUX -U AUX A19 A20 A1 A2 IN1 U AUX RELE FINALI K3 K4 K5 K6 A9 A10 A11 A12 A13 A14 Block diagram for the simultaneous opening of two interface Circuit Breaker (DI-A and DI-B) made by one or both NV10P relays 90 NV10P - Manual CHARACTERISTICS

91 The diagram shows an example that uses the virtual I / O circuits where the S1 relay transmits the information relating to the 59N function to relay S2, S3 and S4 and simultaneously the OR logic for the command of the interface devices is achieved. NV10P PROTECTION RELAY D1 Ethernet VOUT1 START UE>> VOUT2 TRIP - UE>> START - UE>> TRIP - UE>> IP: S1 START - UE>> TRIP - UE>> Telescatto DDI NV10P PROTECTION RELAY NV10P PROTECTION RELAY NV10P PROTECTION RELAY DDI UE>> (Abilita f<,f>) Remote trip VIN1 VIN2 D1 DDI UE>> (Abilita f<,f>) Remote trip VIN1 VIN2 D1 DDI UE>> (Abilita f<,f>) Remote trip VIN1 VIN2 D1 VOUT2 VOUT2 VOUT2 Trip NV10P Trip NV10P Trip NV10P IP: S2 IP: S3 IP: S4 S1 outputs The VOUT1 and VOUT2 outputs must be programmed as in Example 1 to transmit information about to the 59N protection, processed by the S1 relay to relay S2, S3 and S4 where the measure of residual voltage is missing: Start, used as a start signal of the second threshold of 59N protection (S1) in order to activate the first threshold of under and over frequency (81U and 81O) of the protections S2, S3 and S4. Trip, used in Example as trip signal of the second threshold of 59N protection (S1) in order to control the opening of the interface device by means of remote tripping of protections S2, S3 and S4 S2, S3 e S4 inputs The enable of the first threshold of under and over frequency (81U and 81O) is set to the occurrence of an earth fault (start UE >> active on S1 protection) on the VIN1 virtual input and the remote trip on the VIN2 virtual input protection on S2, S3 and S4 relays that drive the circuit breaker interface. S2, S3 and S4 outputs The output VOUT2 must be set to carry out the logical OR for the opening command of all the circuit breaker interfaces (simultaneous control of all the CBs function from each NV10P): Trip, used in the example as a trip signal of the protection functions of S1 in order to control the opening of the interface device by means of remote tripping of protections S2, S3 and S4 Links (virtual pilot wires) After defining the input and output circuits the virtual links must be created. A unique IP address for each relay must be assigned. To transmit information to a group of devices the Multicast communication mode is available. CHARACTERISTICS NV10P - Manual

92 Remote tripping Preface Some output relays may be programmed for remote trip function resulting from a command coming from a binary input. If a binary input is designed for remote trip acquisition, an output relay allocated to the same function is triggered when the input (IN1 and/or IN2) is active. Operation and settings The Remote trip matching must be assigned to the selected binary inputs inside the Set \ Inputs \ Binary input1 or Set \ Inputs \ Binary inputx menus. When a binary input is programmed for remote trip acquisition, the IN1 ton, IN2 ton, IN1 toff and IN2 toff time delays must be reset to zero; the Logic parameters (ON/OFF) must be programmed in the same way of the related circuit connected with-it. The RemTrip-K matching must be assigned to the selected output relays inside the Set \ Remote tripping submenu; the same for addressing the LED indicators (RemTrip-L). When output relays are programmed for remote tripping, the t TR time delays must reset to zero; the operation mode must be set with self reset (No-latched inside Set \ Relays submenu) and the Logic parameters (Energized/De-energized) must be programmed in the same way of the related binary input connected with-it. All the parameters are common for A and B Profiles. +UAUX Remote trip Remote trip -UAUX Remote trip Logic n.c. n.o. INx t ON INx t OF F INx t ON INx t OFF T 0 0 T Binary input INx Remote trip RemTrip-K RemTrip-L TRIPPING MATRIX (LED+RELAYS) RemTrBF Remote trip (ON Remote trip) Remote trip BF towards BF logic Remote tripping logic diagram Fun-Remote-trip.ai 92 NV10P - Manual CHARACTERISTICS

93 Frequency tracking Within the frequency range Hz a frequency tracking algorithm adjusts the currents sampling frequency, so as to keep the number of samples in any given period constant. With 24 samples for periods the sampling rate is adjusted from 480 Hz with f = 20 Hz to khz with f= 63 Hz. For a frequency step change the tracking response time is 5 Hz/s for NV10P. The frequency measure is based on the largest voltage input. [1] If the larger input voltage is lower than 1.5 % E n the sampling frequency is fixed to f n (50 or 60 Hz). If the measured frequency is outside the locking range, the sampling frequency is fixed to the lower or upper value (20 or 63 Hz). U L1 U L2 U L3 Max U L1...L3 > E n Frequency tracking Max U L1...L3 16 Hz 90 Hz Displayed value 20 Hz 63 Hz Locked frequency 1.5% E n 50 Hz (0 Hz) f (Hz) Locked frequency (Displayed value) Frequency tracking IF.ai All protective elements are always operative; accuracy is guaranteed inside locked frequency band. Note 1 For inputs from sensors versions the frequency is measured on the phase voltages (U L1, U L2, U L3), while for versions with inputs from inductive VTs the frequency is measured on line-to-line voltages (U 12, U 23, U 31). Inside the diagrams U L1, U L2, U L3 are the input phase-to neutral or phase-to-phase voltages according to the corresponding versions CHARACTERISTICS NV10P - Manual

94 Trip circuit supervision - 74TCS Preface The trip circuit can be monitored to signal possible anomalies that would lead to the missing opening of circuit breaker when trip and/or operator command are issued. Circuit interruption as well as missing of auxiliary voltage and/or coil faults are detected. Supervision with one or two binary inputs can be select; depending on association of binary inputs, the corresponding logic is automatically selected. For this purpose the TCS1 and TCS2 (if two binary input are used) matching must be assigned to the selected binary inputs inside the Set \ Inputs \ Binary input IN1 and Set \ Inputs \ Binary input INx menus. When a binary input is programmed for the TCS function, the IN1 ton, INx ton, IN1 toff and INx toff time delays must be reset to zero and the Logic parameter must be set to Active-ON inside the Set \ Inputs \ Binary input IN1 and Set \ Inputs \ Binary input INx menus. Operation and settings The 74TCS element may be enabled or disabled; to enable it, the 74TCS Enable parameter must be set to ON inside the Set \ Profile A(B) \ Trip circuit supervision-74tcs submenu. A logic block can be set from une binary input. [1] If the 74TCS-BLK1 parameter is set to ON, and a binary input is designed for logical block (Block1), the TCS supervision function is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down. The 74TCS- BLK1 parameter is available inside the Set \ Profile A(B) \ Trip circuit supervision-74tcs submenu. All the parameters can be set separately for Profile A and Profile B. Two inputs supervision With two binary input all malfunctions are detected (inclusive of mechanics faults). The binary inputs are connected to the trip and to the 52b contacts. The CB auxiliary voltage must be 36 V at least (twice the minimum threshold for every binary input). +UAUX TCS1 PRO-N TRIP Binary input IN1 Towards 74TCS logic TCS a 52b Binary input IN2 Towards 74TCS logic -UAUX Trip circuit supervision with two binary inputs - 74TCS The faulty condition is detected occurs if both the following conditions are filled: A) The TRIP contact is closed (external protection relay tripped); B) The circuit breaker is closed (52a closed and 52b open). TCS2s.ai Because such conditions can arise with healthy circuit too (e.g. a trip command is issued by the protection relay but the CB opening time is still in progress), to avoid untimely operations the previous condition are checked every 80 ms and the output is issued after a 2 s delay; outputs are reset to zero if at least the A or B condition become false after 0.6 s delay. [2] Note 1 Since two binary inputs are just used (TCS1 and TCS2), an external I/O module is required for the logic block function. The exhaustive treatment of the logic block (Block 1) function may be found in the Logic Block paragraph inside CONTROL AND MONITORING section Note 2 Following assumption are considered for the framework: Logic: ON, Timers t ON and t OFF: reset to zero TRIP contact of the protection: DE-energized, No latched 94 NV10P - Manual CHARACTERISTICS

95 TCS1 TCS2 74TCS Enable 74TCS-BLK1 Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T T Binary input INx Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T T Binary input INx Enable (ON Enable) Enable (ON Enable) 2 s T 0 0 RESET Start 74TCS Trip 74TCS Start 74TCS 0.6 s T 74TCS-ST-K 74TCS-ST-L 74TCS-TR-K 74TCS-TR-L Trip 74TCS Start 74TCS TRIPPING MATRIX (LED+RELAYS) Trip 74TCS BLK1 74TCS Block1 Logic INx t ON INx t OFF n.c. INx t ON INx t OFF Block1 input (ON Block) n.o. T 0 0 T T Binary input INx Logic diagram concerning the trip circuit supervision with two binary inputs - 74TCS Block1 Fun-74TCS2.ai One input supervision By means of the right sizing of a resistor, the trip circuit supervision may be performed even with lower control voltage (e.g. when the control voltage is less than 36 V required for driving of two binary inputs, typically U AUX = 24V). The binary input is connected to the trip and an external resistor must be connected the 52b auxiliary contact. +UAUX Pro-N TRIP Binary input INx TCS1 Towards 74TCS logic 52 52a R 52b -UAUX Trip circuit supervision with one binary inputs - 74TCS TCS1.ai The fault condition of the trip circuit is detected by binary input power down. With healthy circuit and TRIP contact closed, the binary input is feed across the 52a path (CB closed) or across the resistor R and 52b path (CB open). When the TRIP contact turns ON, the binary input becomes short-circuited; to avoid untimely operations the previous condition are checked every 80 ms and the output is issued after a 40 s delay in order to allow the fault clearing and the consequent reset of the TRIP protection. Outputs are reset to zero after 6 s from the TRIP contact open. [1] Note 1 The trip contact (TRIP) of the protection relays must be set with automatic reset (No-latched operating mode). CHARACTERISTICS NV10P - Manual

96 Start 74TCS TCS1 74TCS Enable Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx Enable (ON Enable) 40 s T 0 0 RESET 6 s Start 74TCS T 74TCS-ST-K 74TCS-ST-L TRIPPING MATRIX (LED+RELAYS) 74TCS-TR-K 74TCS-TR-L Trip 74TCS Trip 74TCS 74TCS-BLK1 Enable (ON Enable) Start 74TCS Trip 74TCS BLK1 74TCS Block1 Logic INx t ON INx t OFF n.c. INx t ON INx t OFF n.o. T 0 0 T Binary input INx Block1 input (ON Block) Block1 Logic diagram concerning the trip circuit supervision with one binary inputs - 74TCS Fun-74TCS1.ai How to calculate resistance Both the following conditions must be filled: 1) The circuit breaker coil must no be powered when the CB is open and an open command is issued; 2) The binary input is energized when the trip contact open. 1) If the circuit breaker is just open an unnecessary excitation must be avoided; the most critical event arises when the TRIP contact is closed (e.g. manual or test command), so with minimal series resistance. To avoid an unwanted excitation the series resistance must be higher than a minimum value defined as: where: R min = R TC (U AUX - U TCmin) / U TCmin U TCmin: minimum coil excitation voltage U AUX: auxiliary voltage R TC: coil resistance 2) To energize the binary input circuit when the TRIP contact and CB open, the series resistance must be lowerer than a maximum value defined as: where: R max = [(U AUX - U DIGmin) / I DIG] - R TC U DIGmin: minimum binary input excitation voltage (18 V) U AUX: auxiliary voltage R TC: coil resistance I DIG: binary input excitation current (0.003 A) To satisfy the above requirements, the R value must be chosen between the R min and R max values; typically the normalized value nearest the arithmetic mean: R = (R min + R max) / 2 The power dissipated by the R resistor is: P R = R I 2 = R [U AUX / (R + R TC)] 2 Example U AUX = 110 Vcc (auxiliary voltage) P TC = 50 W (coil power) R TC = U AUX 2 / P TC = 242 Ω (coil resistance) U TCmin = 77 V (minimum coil excitation voltage = 70% U AUX ) U DIGmin = 18 V (minimum binary input excitation voltage) I DIG = A (binary input excitation current) R min = R TC (U AUX - U TCmin) / U TCmin = 242 (110-77) / 77 = Ω R max = [(U AUX - U DIGmin) / I DIG] - R TC = [(110-18) / 0.003] = Ω R = (R min + R max) / 2 = ( ) / 2 = Ω ~ 15 k Ω P R (Power dissipated by the R resistor) = U AUX 2 /R = / = 0.8 W 96 NV10P - Manual CHARACTERISTICS

97 Circuit breaker supervision Preface Several diagnostic metering and monitoring function are available: By means 52a and 52b auxiliary contacts, the CB position is acquired. Depending on such information the Open and/or Close commands can be safely issued by user. An adjustable threshold can be set for a wear estimate of the breaker contacts; the current values (ΣI or ΣI 2 ) are summed and compared to a user-adjustable threshold. When the threshold or the number of operations is exceeded the relay can activate an output relay. The function helps to adjust maintenance planning. By means 52a and 52b auxiliary contacts, the opening time is calculated and compared to a user-adjustable threshold. If the threshold is exceeded the relay can activate an output relay. Opening transition Towards CB diagnostic 52 +UAUX 52a -UAUX 52b 52a IN+ 52b IN+ IN- IN- Logic n.c. n.o. Logic n.c. n.o. INx t ON INx t ON INx t OFF T 0 0 T Binary input INx INx t ON INx t OF F INx t OF F INx t ON INx t OFF T 0 0 T Binary input INx =1 t mask t mask T 0 CB monitoring 52a ON/OFF TRIPPING MATRIX (LED) 52b ON/OFF Logic diagram concerning the circuit breaker diagnostic function Fun-CB-position.ai Operation and settings According to the conventional contact position 52a is the auxiliary contact that is in the same position as the circuit breaker, (52a open = CB open), 52b is the auxiliary contact that is in the opposite position as the circuit breaker, (52a open = CB closed). To acquire the CB position, the 52a and 52b function must be set inside the Set\Inputs\Binary input 1 and Set\Inputs\Binary input 2 menus. The IN1 ton, IN2 ton, IN1 toff and IN2 toff time delays must be reset to zero and the Logic parameter must be set to Active-ON inside the Set\Inputs\Binary input IN1 and Set\Inputs\Binary input IN2 menus. CIRCUIT BREAKER COMMANDS Two output relays can be set to command CB opening and closing; the CBopen-K and CBclose-K function must be set inside the Set\Circuit breaker supervision\leds-relays allocation menu; the CB position can be visualized by means two LEDs (CBopen-L and CBclosed-L parameters). All the parameters are common for Profile A and Profile B. CIRCUIT BREAKER DIAGNOSTIC Four different criteria can be select. 1) Number of CB trip mode (ModeN.Open ON). When the number of operations (N.Open) is exceeded, an output relay and/or LED can be activated. 2) Cumulative CB currents mode (ModeSumI ON). When the per-phase value exceeds the threshold, an output relay and/or LED can be activated. 3) Cumulative CB I 2 t mode (ModeSumI^2t ON). The tripping energy I 2 t is calculated on the base of current measure at the time of the open command on the base of the circuit breaker opening time provided for I 2 t calculation (tbreak). When the per-phase value exceeds the threshold, an output relay and/or LED can be activated. 4) CB operating time mode (Mode-tOpen ON). The time interval between the trip command and the CB open acquisition is calculated on the base of a programmable relay (Ktrig-break). When the time interval (tbreak>) is exceeded, an output relay and/or LED can be activated. The four criteria can be contemporaneously or separately set. All the named parameters are available inside the Set\Circuit Breaker supervision\cb Diagnostic menu. CHARACTERISTICS NV10P - Manual

98 State N.Open From CB position Opening transition N.Open Mode-N.Open N.Open-K N.Open-L TRIPPING MATRIX (LED+RELAYS) CB Diagnostic - Number of trips From CB position Opening transition Ktrig-break t break Mode-tOpen State tbreak tbreak-k tbreak-l TRIPPING MATRIX (LED+RELAYS) CB Diagnostic - CB operating time Fun-CB-diagnostic.ai 98 NV10P - Manual CHARACTERISTICS

99 Oscillography Trigger Setup Following parameters, available inside the Set \ Oscillography \ Trigger Setup menu, are user-programmable: Pre-trigger time and Post-trigger time. Trigger pre-trigger post-trigger Time Trigger oscillography trigger.ai Element pickup trigger; the information recording starts when a state transition on any protective element occurs if the parameter is set to ON. Trigger from outputs; the information recording starts when a state transition on the selected output relay occurs if the parameter is set (K1...K6). Binary input trigger; the information recording starts when a state transition on the selected binary input occurs if the parameter is set to ON. Trigger from inputs; the information recording starts when a state transition on the selected binary input occurs if the parameter is set (IN1...INx). 80% Buffer alarm; when the 80% of the buffer space is reached an alarm may be issued if the parameter is set to ON. Set sampled channels The desired sampled quantities may be select inside the Set \ Oscillography \ Set sampled channels menu (u L1, u L2, u L3, u E). Set analog channels The desired sampled quantities may be select inside the Set \ Oscillography \ Set analog channels menu. Everyone of twelve analog channel may be associated to one of the selected measures (Frequency, U L1, U L2, U L3, U 12, U 23, U 31, U E, U EC, U 1, U 2, df/dt, T1...T8 [1] ). Set digital channels The desired digital quantities may be select inside the Set \ Oscillography \ Set digital channels menu. Everyone of twelve digital channel may be associated to one of the selected I/O signal (K1... K6, K7... K10, IN1, IN2, IN3...IN42 [2] ). Note 1 The 26 menu is available when the MPT module is enabled Nota 2 The output relay K7...K10 and binary input IN3...IN42 states is meaningful when the I/O circuits are present (MRI and MID16 modules) CHARACTERISTICS NV10P - Manual

100 5 MEASURES, E S LOGIC STATES T S AND COUNTERS Measures Direct Frequency (f ) Phase voltages RMS value of fundamental component (U L1, U L2, U L3) Residual voltage RMS value of fundamental component (U E) Calculated Phase-to-phase voltages [1] (U 12-U 23-U 31) Maximum voltage between U L1-U L2-U L3 (U Lmax) Average voltage between U L1-U L2-U L3 (U L) Calculated residual voltage (U EC) Positive sequence voltage (U 1) Negative sequence voltage (U 2) Third harmonic of residual voltage (U E-3rd) Frequency rate of change (df/dt) Averages Phase average voltages (U L1avg, U L2avg, U L3avg ) Phase-to-phase average voltages (U 12avg, U 23avg, U 31avg ) Maximum voltage between U L1avg, U L2avg, U L3avg (U Lavgmax) Maximum voltage between U 12avg, U 23avg, U 31avg (U avgmax) Protection Delayed inputs Internal states Relays Counters For each protection threshold, the following data are available: Start ON/OFF Trip ON/OFF Logic block (Block1) ON/OFF The binary input states, acquired downstream the delay timers are available: IN1 ON/OFF IN2 ON/OFF The state of the functions assigned to binary inputs are available (Read\Internal states): Reset LEDs ON/OFF Profile selection ON/OFF Fault trigger ON/OFF Block1 ON/OFF Tcs1 ON/OFF Tcs2 ON/OFF Trip External protections ON/OFF Reset partial counters ON/OFF Reset CB monitoring data ON/OFF 52a ON/OFF 52b ON/OFF Open CB ON/OFF Close CB ON/OFF Thermal image presetting ON/OFF Remote trip ON/OFF 74VT ext. ON/OFF f<-f> Control ON/OFF For every output relay, the output operating state and diagnostic are available (Read \Relays menu): K1 State ON/OFF K1 Diagnostic OK/NOT OK K2 State ON/OFF K2 Diagnostic OK/NOT OK... K6 State ON/OFF K6 Diagnostic OK/NOT OK For every element two set of counters are available (Partial counters and Total counters); the partial counters can be cleared by the user level, while the Total counter reset can be achieved with password (Session Level 1). Every partial counter is reset to zero when ten thousand count is passed. All partial counters can be cleared by means a single command; for this purpose the Reset partial counters command must be issued (Commands \ Reset submenu). Not 1 Available for sensor input versions 100 NV10P - Manual MEASURES, LOGIC STATES AND COUNTERS

101 Self test Fault recording - SFR Partial counters Total counters 27 - Counters 27V1 - Counters 59 - Counters 59V2 - Counters 59Uavg - Counters 59N - Counters 81O - Counters 81U - Counters 81R - Counters 74TCS - Counters CB - Counters BF - Counters xx Start partial counter (xx = I>, I>>,...) xx Trip partial counter (xx = I>, I>>,...) xx Block1 partial counter (xx = I>, I>>,...) xx Block2 partial counter (xx = I>, I>>,...) xx Start total counter (xx = I>, I>>,...) xx Trip total counter (xx = I>, I>>,...) xx Block1 total counter (xx = I>, I>>,...) xx Block2 total counter (xx = I>, I>>,...) Lower level diagnostic (MINOR) can be output or ignored; for this purpose the MINOR Fail alarm parameter can be set ON or OFF inside the Set\Self test relay submenu. Following anomalies (MINOR) are not relevant (the protective elements continue to work): Errors concerning the digital fault recorder. Internal bus. The self test information are: Protection and controls ON SERVICE/OUT OF SERVICE System diagnostic OK/NOT OK Device diagnostic OK/NOT OK Program diagnostic OK/NOT OK Data-base boot OK/NOT OK Data-base runtime OK/NOT OK DSP boot OK/NOT OK DSP run-time OK/NOT OK Memory boot OK/NOT OK Memory run-time OK/NOT OK Data Bus heavy OK/NOT OK Data Bus minor OK/NOT OK Oscillography run-time OK/NOT OK PLC boot OK/NOT OK PLC run-time OK/NOT OK Protection I/O assigned verify startup OK/NOT OK Protection I/O assigned verify run-time major OK/NOT OK Protection I/O assigned verify run-time minor OK/NOT OK Total protection I/O assigned not-matching 0 Protection I/O assigned not-matching PLC I/O assigned not-matching OK/NOT OK PLC I/O assigned not-matching run-time major OK/NOT OK PLC I/O assigned not-matching run-time minor OK/NOT OK Total PLC I/O assigned not-matching 0 PLC I/O assigned not-matching MMI module Boot OK/NOT OK MMI module Run-time OK/NOT OK MRI module Boot OK/NOT OK MRI module Run-time OK/NOT OK MID16-1 module Boot OK/NOT OK MID16-1 module Run-time OK/NOT OK MID16-2 module Boot OK/NOT OK MID16-2 module Run-time OK/NOT OK PT100 module Boot OK/NOT OK PT100 module Run-time OK/NOT OK Current loop module Boot OK/NOT OK Current loop Run-time OK/NOT OK Oscillography run-time OK/NOT OK The diagnostic alarms can be allocated to an output relay; for this purpose the Self-test relay parameter can be set (K1...K6) inside the Set \ Self-test Relay submenu. Recording is triggered by one or more causes (up to 8 simultaneous): Activation (OFF-ON transition) of any relay programmed for trip of protection or control element External trigger (binary input programmed as Fault trigger) MEASURES, LOGIC STATES AND COUNTERS NV10P - Manual

102 Twenty events are recorded into a circular FIFO (First In, First Out) buffer. [1][2] Following information are stored in every record: Fault counter [3] Date and time Fault cause (element trip) Input phase voltages U L1r, U L2r, U L3r Input phase-to-phase voltages U 12r, U 23r, U 31r Phase average voltages U L1avgr, U L2avgr, U L3avgr Phase-to-phase average voltages U 12avgr, U 23avgr, U 31avgr Measured residual voltage U Er Calculated residual voltage U ECr Positive sequence voltage U 1r Negative sequence voltage U 2r Frequency f r Frequency rate of change df r Inputs Outputs Fault cause info (eg. faulted phase) Event recording - SER Oscillography - DFR Recording is triggered by one or more causes: Start and/or trip of any enabled protection or control element Binary input activation (OFF-ON or ON-OFF transition) Power-on or power-down (Auxiliary power supply) Setting change. Three hundred events are recorded into a circular FIFO (First In, First Out) buffer. [2][4] Following information are stored in every record: Event counter [5] Date and time Event cause (binary input/element trip/setting change) Upon programmable trigger, the fault records are recorded in COMTRADE format; the sampled measures (24 sample per cycle) are stored in a circular shift memory buffer. The fault record are self-triggered; they are stored in sequential order up the allocated memory is used up after which the oldest memory is overwritten. An operating procedure example for the digital fault recording is illustrated inside the ThySetter section. Following parameters are user-programmable: Pre-trigger and post-trigger time Selected sampled quantities. Analog channels (1...12) allocation. Digital channels (1...12) allocation (output relay and/or binary inputs). Trigger setup; the information storage starts when a state transition on the selected signal occurs. (protective element start and/or trip, output relay and/or binary input switching). Alarm: when the 80% of the buffer space is reached an alarm may be issued. The system being of linear type, the records are back-to-back recorded to the end of available memory; the alarm output is a warning in order that the user may download the data FLASH [6] to clear memory for new records. Trigger pre-trigger post-trigger Time Trigger oscillography trigger.ai Following parameters are user-programmable: Sample channels Instantaneous value for input voltages u L1, u L2, u L3 Instantaneous value for residual voltage u E Analog channels Frequency f Fundamental component for input phase voltages U L1, U L2, U L3 Fundamental component for input phase-to-phase voltages U 12, U 23, U 31 Note 1 Fault 0 is the newest fault, while the Fault 19 is the oldest fault Note 2 Data are stored in non volatile memory; they are held in spite of power down Note 3 Counter is updated at any new record; it may be cleared by means ThySetter Note 4 Event 0 is the newest event, while the Event 299 is the oldest event Note 5 Counter is updated at any new record; it may be cleared by means ThySetter Note 3 Data are stored into non volatile memory FLASH, they are preserved also when power goes down 102 NV10P - Manual MEASURES, LOGIC STATES AND COUNTERS

103 Digital channels Binary inputs Output relays Fundamental component for measured residual voltage U E Fundamental component for calculated residual voltage U EC Fundamental component for positive sequence voltage U 1 Fundamental component for negative sequence voltage U 2 Frequency rate of change df /dt COMTRADE Records are recorded in COMTRADE format; (Common Format for Transient Data); This is a standard for the data exchange for various types of tests or simulation datas, etc, for power system applications. The measurements are recorded in ASCII or BINARY format. COMTRADE files always come by pairs: The.CFG -file describing the configuration: number of analog and digital channels, sampling rate, scale factors, etc. The.DAT -file containing the data The COMTRADE is part of IEC standard. The recording can be analyzed by mean of ThySetter sw or any other standard compliant viewer. The record quantity (max 400 records) is depending on settings of following parameters: Pre-trigger and post-trigger times Number of allocated channels. By means of the following formula the record quantity may be evaluated: s N = int v i + 4 v RMS + n B (t pre + t post )(s) 50 (Hz) f (Hz) where: N: record quantity v i: sampled measures v RMS: analog measures (RMS) n B: logic variables t pre: pre-trigger time interval t post: post-trigger time interval f : frequency Example 1 With the following setting: Pre-trigger: Post-trigger: Sampled measures: Analog measures: Logic variables: 819 record can be stored if f = 50 Hz, since: 0.5 s 0.5 s u L1, u L2, u L3, u E U L1, U L2, U L3, U E K1, K2, K3, K4, K5, K6, IN1, IN s 50 (Hz) N = int = ( )(s) 50 (Hz) Example 2 With following setting: Pre-trigger: 0.5 s Post-trigger: 0.5 s Sampled data: u L1, u L2, u L3, u E Analog measures: U L1, U L2, U L3, U E Digital channels: K1, K2, K3, K4, K5, K6, IN1, IN2 up to 204 records can be stored if f = 60 Hz, since: s 50 (Hz) N = int = ( )(s) 60 (Hz) MEASURES, LOGIC STATES AND COUNTERS NV10P - Manual

104 6 INSTALLATION L A T I N 6.1 PACKAGING Packaging consists of a polystyrene foam packaging guaranteeing adequate protection for transport and storage under normal environmental conditions. The Pro_N protection relays must be stored within the required temperature limits; the relative humidity should not cause condensation or formation of frost. It is recommended that the devices are stored in their packaging; in the case of long storage, especially in extreme climatic conditions. It is recommended that the packaging not be disposed of into the environment, but kept in case the relay should be moved at some later time. 6.2 MOUNTING The Pro_N protection relays are housed inside metal cases suitable for various kinds of assembly: Flush mounting Projecting mounting With separate operator panel 19 Rack. Removability is ensured to facilitate maintenance operations so that the electronic module can be replaced; this provides minimum downtime and maximum protection availability. Flush mounting The fixed case, fitted with special fastening brackets, is mounted on the front of electric control board, previously drilled as indicated in the drawing. In case of side-by-side mounting of several relays the minimum drilling distance is determined by the front dimensions indicated in the overall dimensions drawing, increased by 3 mm, to ensure an adequate tolerance and gasket space between adjacent relays. The depth dimension, as indicated in the drawing, must be increased by as much as needed to allow room for the wiring D1 A1 A2 A3 A4 A5 C1 C2 RX F1 F2 F3 A6 A7 TX F4 F5 A8 C3 C A9 A10 A11 A12 A13 A14 A15 A16 C5 C6 B1 B2 B3 B4 B5 B6 B7 B8 A17 A18 A19 A20 C7 C8 A21 A22 E ± ON START TRIP Flush mounting NOTE N.4 holes ø 3,5 Separation of fixed and removable parts is NOT required Flush-mount.ai 104 NV10P - Manual INSTALLATION

105 Remove the upper tile and open the little door to access the fastening screws. Removing tie to access the fastening screws Remove-tile.ai The fixed case is fastened by means of four screws onto the panel as indicated in the drawing. Four screws Flush-mount1.ai Projecting mounting Remove the ground screw and open the little door to access the fastening screws. In case of side-by-side mounting of several relays, the minimum fixing distance is determined by the dimensions of the mounting plate indicated in the overall dimensions drawing, increased horizontally and vertically by as much as needed to allow room for the wiring and to ensure an adequate tolerance between the apparatus ON START 80 TRIP 31 Projecting mounting Projecting.ai INSTALLATION NV10P - Manual

106 Separate operator panel The solution with projecting assembly and a separate operator panel is particularly suitable for limited in depth installations. Cutout dimension and mounting steps concerning the separate operator panel are the same for the flushing mounting (see previous pages) D1 A1 A2 A3 A4 A5 C1 C2 RX F1 F2 F3 A6 A7 TX F4 F5 A8 C3 C4 177 ON START TRIP A9 A10 A11 A12 A13 A14 A15 A16 C5 C6 B1 B2 B3 B4 B5 B6 B7 B8 A17 A18 A19 A20 C7 C8 A21 A22 E1 Separate operator panel N.4 holes ø 4,5 20 Separate-mount.ai A standard direct shielded cable with RJ45 connectors must be used for connections. Separate operator panel Separate-mount1.ai 106 NV10P - Manual INSTALLATION

107 Rack mounting For mounting inside a standardized 19-inch system (EIA 310-D, IEC and DIN SC48D), the MAR adapter is required (frame available on request) (4U) ON START ON TRIP 1 3 START ON TRIP 1 3 START ON TRIP START TRIP Rack mounting Rack-mount.ai To allow opening of the keyboard door a one unit space must be provided when several rack are overlapping mounted. Rack mounting Rack-mount1.ai INSTALLATION NV10P - Manual

108 6.3 ELECTRICAL CONNECTIONS Electrical connections should be made by referring to the connection diagram; in cases where certain of the circuits (communication, block, or others) are not used, the relevant connections must remain open. Examples of connection diagrams are reported on Appendix to this manual. CAUTION Devices must be installed by qualified personnel only. No liability is accepted from Thytronic due to improper use. Inductive VTs or direct connection A protective ground connection is required, which must be connected to the suitable screw with a separate lead of at least 2.5 mm 2. Screw terminals are available for the connections, the use of terminals is recommended. For the A1...A22 connections, screw terminals with following characteristics are available: Nominal cross section: mm 2 (AWG ) for single conductor da 0.14 a 0.75 mm 2 for two conductors with same cross section Tightening torque: Nm Stripping length: 8 mm For the B1...B8 connections, screw terminals with following characteristics are available: Nominal cross section: da 0.2 a 2.5 mm 2 (AWG ) for single conductor da 0.2 a 1.5 mm 2 for two conductors with same cross section Tightening torque: Nm Stripping length: 7 mm For the F1...F5 (RS485) connections, screw terminals with following characteristics are available: Nominal cross section: da 0.2 a 2.5 mm 2 (AWG ) for single conductor da 0.2 a 1.5 mm 2 for two conductors with same cross section Tightening torque: Nm Stripping length: 10 mm. D1 U AUX K1 K2 K3 K4 K5 K6 IN1 IN2 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 C1 C3 C5 C7 C2 C4 C6 C8 RX TX B1 B2 B3 B4 B5 B6 B7 B8 F1 F2 F3 F4 F5 RJ45 Ethernet plug RS485 B- A+ Voltmetric inputs RJ45 Thybus plug E1 108 NV10P - Manual INSTALLATION

109 Electronic sensor inputs Links to the voltage inputs are made via wired RJ45 plugs.. D1 U AUX K1 K2 K3 K4 K5 K6 IN1 IN2 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 L1 L2 L3 RX TX B1 B2 B3 B4 B5 B6 B7 B8 F1 F2 F3 F4 F5 RJ45 Ethernet plug RS485 B- A+ Voltmetric inputs for V-Sensor or ThySensor RJ45 Thybus plug E1 Connessioni per versioni con circuiti d entrata voltmetrici da sensori A protective ground connection is required, which must be connected to the suitable screw with a separate lead of at least 2.5 mm 2. Ground screw Earthing rear.ai INSTALLATION NV10P - Manual

110 Binary inputs The dry input circuits, despite being galvanically isolated, must preferably be supplied with the same auxiliary voltage of the control panel. The inputs are polarity free with wide voltage range. +UAUX A B A19 A20 IN1 -UAUX A21 A22 IN2 Binary inputs Binary-sch.ai The optoisolated inputs are immune to transitory interferences, however the following recommendation must be considered in high disturbed environments: Position input wiring away from high energy sources. Set a debounce timer (ton and/or toff) to alloy the transient to decay. Use shielded cables with ground connection on only one end (preferably at the relay side. Output relays Six output relays are available. It is advisable to verify that the technical characteristic of the contacts be suitable for the applied load (about current, nominal voltage, make and break current, etc..). Output relay K1 and K2 have one change over contacts (SPDT, type C). Output relay K3 and K4 have one make contact (SPST-NO, type A) and a common reference (A10 terminal). Output relay K5 and K6 have one make contact (SPST-NO, type A for K5), one break contact (SPST- NC, type B for K6) and a common reference (A13 terminal). All contacts are shown in de-energized state for standard reference. CAUTION It is advisable to verify that the technical characteristic of the contacts be suitable for the applied load (about current, nominal voltage, make and break current, etc..). For all diagrams the output contacts are shown in de-energized state for standard reference. RS232 port The link from PC and NV10 serial port must be established by means a L10041 cable provided by Thytronic. The RS232 port takes priority over other communication links (Ethernet or RS485 port. RJ10 Connector Pin Female connector (solder side) RXD 7 3 TXD 8 4 DTR 9 5 GND L10041 USB-RS232 converter (if none RS232 PC port is available) serial1-sch.ai When no RS232 port is available on Personal Computer, a suitable USB to RS232 converter must be employed. After installation, the same communication port must be selected to define the Thysetter parameters (typically COM4, COM5,...). 110 NV10P - Manual INSTALLATION

111 Ethernet port An Ethernet port may be provided with RJ45 or FX optics fiber interface. For testing a PC may be directly connect to the NV10 Ethernet port on the rear side. With TX interface a cross cable must be employed, while an Ethernet-optical fiber converter, suitable for 100 Mb data rate must be employed. cross cable ethernet-wiring.ai The link must be enabled by means ThySetter sw and RS232 connection: Set the IP address (Host IP address e IP net mask) in order that the NV10 and PC parameters are matched; the parameters are inside the Communication\Ethernet submenu. Set to OFF the Autonegotiation parameter of NV10 device (Autonegotiation parameter inside Communication\Ethernet submenu). For security reasons, a change of the Ethernet communication parameters become active only after an hw reset.. INSTALLATION NV10P - Manual

112 RS485 port RS485 communication circuit connections must be made using screened twisted pair cable observing the polarities; screening must only be connected to the end terminating at the RS485 interface circuit pertaining to the monitoring unit. It is recommended to terminate the line at the extremities of the same; this must be performed on the RS485 line control unit and on the NV10 device placed at the furthest point connecting the specially provided resistor; termination can be made by means a jumper between the F2-F3 terminals. PRO-N PRO-N A1 A2 UAUX ETHERNET RS485 B- A+ F1 F2 F3 F4 F5 D1 RS485 F1 F2 F3 B- F4 A+ F5 SUPERVISION UNIT THYBUS E1 RS Ω B- A+ A17 A18 BLOCK IN BLOCK OUT BLOUT- BLOUT+ A15 A16 A19 A20 A21 A22 IN1 IN2 BINARY INPUTS RS232 FRONT PANEL RS485-wiring.ai Termination resistors allow adjusting the impedance of the line, reducing the influence of the inductive components of the same, which might compromise good communication. 112 NV10P - Manual INSTALLATION

113 Thybus port In order to extend I/O capability, the Pro_N relays can be customized through external auxiliary modules; moreover ma converter and temperature measuring modules are provided. The modules do not need external auxiliary supply. It is fed directly by Thybus port. The Thybus link must be carried out by means category 5 shielded cable with RJ45 connectors. MRI Pro_N THYBUS INTPUT THYBUS OUTPUT A1 A2 A17 A18 A19 A20 A21 A22 IN1 IN2 U AUX BLOCK IN BINARY INPUTS THYBUS BLOCK OUT RS232 BLOUT- BLOUT+ FRONT PANEL E1 A15 A OUTPUT INPUT MODULO 4 RELE + 8 INGRESSI DIGITALI MODULO INGRESSI REMOTI 4 RELAYS + 8 BINARY INPUTS MODULE ON BUS RUN ON BUS RUN MID8 MRI IN1 IN2 IN3 IN4 IN5 IN6 IN7 IN8 BINARY INPUTS OUTPUT RELAYS K1 K2 K3 K PT8 MPT8 PT7 MPT7 PT6 MPT6 PT5 MPT5 MPT T HYBUS INPUT THYBUS OUTPU T OUTPUT INPUT MODULO PT100 PT100 MODULE ON BUS RUN MPT PT1 MPT1 PT2 MPT2 PT3 MPT3 PT4 MPT PT1 MPT1 PT2 MPT2 T1 T2 T8 T7 PT8 MPT8 PT7 MPT OUTPUT INPUT MODULO INGRESSI REMOTI ON BUS RUN MID PT3 MPT3 PT4 MPT4 T3 T4 T6 T5 PT6 MPT6 PT5 MPT MID16 THYBUS INTPUT THYBUS OUTPUT OUTPUT INPUT ON BUS RUN MODULO INGRESSI REMOTI MID IN1 IN2 IN3 IN4 IN5 IN6 IN7 IN8 BINARY INPUTS IN9 IN10 IN11 IN12 IN13 IN14 IN15 IN INSTALLATION NV10P - Manual

114 The maximum length of the Pro-N device - module link is: 2 m for MRI module (max one module) 20 m for MMOS-4 module (max one MMI module) 30 m for MID16 and MPT modules 2 m for MPT module (max one Pt100 module) 2 m for MCI module (max one current converter module) For upgrading, that may be operated at any time with in service devices too, the following operations must be performed: Turn OFF power supply Connect the auxiliary modules to the Thybus port in daisy chain mode following the INPUT-OUTPUT sequence. [1] If two MID16 (binary inputs) are installed, the hardware address must be set to avoid communication collisions on the Thybus; for this purpose the default address must be changed on one module, by means of dip-switch on the top circuit board (front plate must be removed). default address modified address (2nd MID16 module) 8 1 OFF 8 1 OFF S1 ON S1 ON MID16 hardware address setting DIP-MID16.ai Turn on power Go on to the sw setting (see SETTING section of instruction manual). Note 1 The insertion order is free. One MRI module, two MID16 modules, one MPT module, one MCI module and one MMI module (separate operator panel) can be connect at the same time to the Thybus port (maximum expansion). 114 NV10P - Manual INSTALLATION

115 6.4 LED ALLOCATION Following indicator LEDs are available on the front panel: LED ON (green): if no diagnostic anomalies are detected, the green LED is turned ON while any fault is highlighted by flashing. LEDs (red) are freely assignable from the user to any protective and/or control functions. LED START (yellow) committed for start information of any protective functions. LED TRIP (red) committed for trip information of any protective functions. ON Diagnostic Start Trip LED user-programmable LEDs Label_LED 6.5 FINAL OPERATIONS Before energizing the electric board, it is advisable to check that: The auxiliary voltage in the panel falls within the operative range of Pro_N relays. The relay rated voltage (100 V or 400 V) corresponds to the Pro_N input voltages. All wirings are correct. All screws are tightly screwed. INSTALLATION NV10P - Manual

116 7 PROGRAMMING R M G AND SETTINGS T S All relay programming and adjustment operations may be performed through MMI (keyboard and display) or using a Personal Computer with the aid of the ThySetter software. WARNING 7.1 ThySetter SW ThySetter installation For safety reasons, a change of the following parameters become active only after an hw reset: - Relay nominal frequency (f n) - Ethernet communication parameters (IP host address, IP net mask, Autonegotiation). The ThySetter sw is a browser of data (setting, measure, etc..); it implements an engine that is afford to rebuild the menu set up and the relationships to data concerning all Thytronic protective relays by means of XML files. The latest release of ThySetter can be downloaded free of charge from the site (Software ThySetter - area download). ThySetter use Please refer to ThySetter user manual for detailed instructions. The document is available on site. 116 NV10P - Manual SETTING AND COMMISSIONING

117 7.2 MMI (Man Machine Interface) On the front panel there are eight buttons which allow the user to perform all the settings, reading and modification operations. [1] LEDs ENTER OPEN CB CLOSE CB Navigation keys Reading variables (READ) The adjustment of the settings and the operation mode of the final relays must be performed while the unit is electrically powered; the alphanumeric display shows the necessary information with reference to the operations performed through the keyboard. One minute after the keyboard is not more in use, the display backlight switches automatically to OFF. All preset values are permanently stored in the nonvolatile memory. The buttons take the following operations: - (Up) allows moving the cursor upwards to the preceding menu options, - (Down) allows moving the cursor downwards to the subsequent menu options, - (Left) allows moving the cursor upwards to the preceding menu options, - (Right) allows moving the cursor downwards to the subsequent menu options, - (Enter) allows access to the selected menu with the option of modifying any given parameter, - (Reset) allows aborting the current changes and/or accessing the previous menu. - Circuit breaker commands (open-close), At power-up, the display shows the text: THYTRONIC Pro_NV10P-MB0-x date and time: (01/01/ :00). The ON green Led points out the auxiliary power supply voltage (permanent lighted) and possible faults (blink lighted). The display backlight is automatically activated when any key switch is set. By means of the (Up) or (Down) buttons, it is possible to cyclically browse through the menu options: READ, SET, COMMUNICATION, TEST Having identified the sub-menu of interest, it is possible to gain access by using the (Right) button and then analogously, run through the relevant options by using the (Up) or (Down) buttons. The full menu tree and some examples are showed in the following pages (numerical values and settings are pointed out as examples and does not agree with real situations. All data (measure, settings, parameters, etc...) can be displayed; they are arranged in functional group submenus: >> SERIAL NUMBER >> INFO >> MEASURES >> ACTIVE PROFILE >> PROTECTIONS >> PLC >> CIRCUIT BREAKER SUPERVISION >> DELAYED INPUTS >> INTERNAL STATES >> RELAYS >> PARTIAL COUNTERS >> TOTAL COUNTERS >> SELF-TEST >> FAULT RECORDING >> EVENTS RECORDING >> Note 1 Setting changes are enabled when the La menabling setting by MMI parameter is set SETTING AND COMMISSIONING NV10P - Manual

118 The complete menu is shown in the following pages. Setting modifying (SET) All changes in the setting parameters are carried out through MMI only if the Enable setting by MMI parameter is ON. (ENABLE SETTING BY MMI submenu inside the SET menu). To effect a change, having identified the parameter intended for change, the following procedure must be performed: Press the (Enter) button for a few seconds; the modification in progress status is highlighted by the both START and TRIP flashing. Move the cursor over the parameter intended for change using the (Enter) button, Change the parameters by means the (increment) or (decrement) buttons, Press the (Enter) button to move the cursor over the last parameter in the display, Press the (Enter) button once again; the cursor and the LED TRIP turn off (the LED START keeps flashing), Press the (Enter) button for a few seconds; new message appears: Confirm settings? Answer to the message ENTER: YES to confirm changes or RESET: NO to abort. The end of the START LED blinking points out the end of procedure.; the changes become right now active. The abort command may be used to abandon changes (prior to use of the ENTER: YES); the same effect is achieved by powering down the auxiliary power supply. As example, to set the operating mode of the K1 output relay as ENERGIZED, LATCHED, the following procedure must be issued: By means (Down) button select the Set menu SET >>, Press the (Right) button to enter; the following submenu title i displayed: BASE >> Scroll menus by means (Down) button INPUTS >> RELAYS >> LEDS >> SELF-TEST RELAY >> ENABLE SETTING BY MMI >> PROFILE SELECTION >> PROFILE A >> PROFILE B >> PLC >> CIRCUIT BREAKER SUPERVISION 52 >> REMOTE TRIPPING >> Select the Set menu RELAYS >>, the K1 relay Setpoints >> message is displayed, Press the (Right) button to enter; the following messages are displayed: Logic DE-ENERGIZED Mode NO LATCHED Press the (Enter) button for a few seconds; the modification in progress status is highlighted by the both START and TRIP flashing. Move the cursor over the parameter intended for change using the (Enter) button, (in our case on the message Logic DE-ENERGIZED, Change the parameters by means the (increment) or (decrement) buttons, Logic ENER- GIZED, Press the (Enter) button to move the cursor over the last parameter in the display, Mode NO LATCHED, Change the parameters by means the (increment) or (decrement) buttons, Mode LATCHED, Press the (Enter) button once again; the cursor and the LED TRIP turn off (the LED START keeps flashing), Press the (Enter) button for a few seconds; new message appears: Confirm settings? Answer to the message ENTER: YES to confirm changes or RESET: NO to abort. 118 NV10P - Manual SETTING AND COMMISSIONING

119 TEST COMMUNICATION Circuit breaker commands The operational tests with command of the selected output relays may be activated. By means of (Up) or (Down) buttons it is possible to browse the main menu till the TEST message; to enter you must press the (Right) button. [1] The display message Test state: OFF shows the test state (OFF or test in progress). By means (Down) button it is possible to browse the menu to select: Start test, Stop test Test K1 Test K2 Test K3 Test K4 Test K5 Test K6 As example, to start the test of K1, the following procedure must be issued: Select the Start test menu Start test >>. Press the (Right) button to start; the test in progress status is highlighted by activation of all LEDs, Come back by pressing the (Left) button and select the relay to be tested by means the or buttons until the message Test K1 >> is displayed. Press the (Right) button to start the test. To terminate the test, it is necessary to select the Stop test >> message and press the (Right) button to end the test. In any case the test will be automatically terminated after a delay of one minute. Inside the COMMUNICATION menu it is possible to read/modify the setting data of the RS485 Protocol and Ethernet parameters. By means of (Up) or (Down) buttons it is possible to browse the main menu till the RS485 Protocol >> or Ethernet parameters >> message; to enter you must press the (Right) button. As example, to select the address 12 for the IEC60870 protocol, the following procedure must be issued: Select the Communication menu COMMUNICATION >>. By means (Down) button select the RS485 Protocol >>. Press the (Right) button to enter; the following message is displayed: Protocol IEC Address baud Start the procedure to effect a change explained in the Setting modifying (SET) paragraph. By means of the (Open) and (Close) keys, the circuit breaker commands may be issued. The committed output relays must be enabled inside the Circuit Breaker supervision \ LEDs-relays allocation menu. Note 1 Instantly all the relays are switched in rest state, including relays programmed as normally energized SETTING AND COMMISSIONING NV10P - Manual

120 MMI Password management Preface ThySetter In order to prevent setting changes by MMI (keypad and display) to non-enabled operators, a password can be entered. Three modes of operation of the keyboard may be select: OFF - parameter changes by MMI (keypad and display) are disabled, ON - parameter changes by MMI (keypad and display) are enabled, By Password - parameter changes by MMI (keypad and display) are enabled only after entering the password. Setting changes are enabled by default, this setting can be changed using the sw ThySetter operating at level 1 (drop-down menu Preference / Session level). The Parameters setting enable parameter is available inside the Set / MMI menu. NB: to make any changes with ThySetter the setting session must be open, then change the parameter and finally close the setting session. MMI After setting the variable Parameters setting enable as By Password the PASSWORD menu is automatically displayed; by means of the button the ENTER PASSWORD message is displayed followed by Password not ok >>; by means of the button your personal password can be entered with the setting change usual procedure (the default password is 0000): Press the (Enter) button for a few seconds; the modification in progress status is highlighted by flashing of the START and TRIP LEDs and by appearance of the pointer on the bottom Change the parameters by means the or buttons moving the cursor with Press the (Enter) button once again; the cursor and the LED TRIP turn off (the LED START keeps flashing), Press the (Enter) button for a few seconds; new message appears: Confirm settings? Answer to the message ENTER: YES to confirm changes or RESET: NO to abort. The end of the START LED blinking points out the end of procedure; the changes become right now active. After entering the correct password on the current display shows the ENTER PASSWORD and PASSWORD OK >> messages If the password is correct, from now the settings can be changed. Some minute after the keyboard is not more in use, the display backlight switches automatically to OFF, the setting changes are disabled and the password must be re-enter. If you continue to navigate the menu without entering the password, all the settings can be view, but any changes are disabled (holding down for a few seconds the button does not activate the procedure for changing current indicated by the LED flashing START and TRIP and the appearance of a cursor under the parameter. 120 NV10P - Manual SETTING AND COMMISSIONING

121 Password change After entering the correct password on the current display shows the ENTER PASSWORD and PASSWORD OK >> messages; by means of the button the CHANGE PASSWORD >> and through the button the new password can be entered. Password lost Because to change the password the current one must be entered, if the password is lost any parameter or password cannot be changed through MMI and all parameters can only be set by means of ThySetter. To enable settings through MMI without password, the password lock must be disabled by means of PC by connection with ThySetter; the Parameters setting enable parameter inside the Set / MMI menu must be set ON. To re-enable the password lock the data base must reset by the Set the default settings command inside the Commands \ Default setting menu (double click on Default settings, position the pointer on Set default settings, right click -> Send command). NB: With default setting command all protections are disabled, so all settings, including the serial number, should be reinserted. SETTING AND COMMISSIONING NV10P - Manual

122 7.3 MENU TREE THYTRONIC PRO-NV10P-M00-j DATE: 17/05/2012 TIME: 17:29:59 MMI module ON MODULES MRI module OFF DISABLE 27 FUNCTION BY OPERATOR CLOCK ADJUST READ Reset 27-27V1? << No Yes >> DAY: MONTH: YEAR: << Confirm >> SERIAL NUMBER INFO MEASURES ACTIVE PROFILE PLC PROTECTIONS CIRCUIT BREAKER SUPERVISION DELAYED INPUTS HOUR: 14 MINUTE: 25 SECONDS: 0 << Confirm >> Serial number Code NV10P-M00-j Ver.sw 2.60 DSP fw Rel 2.01 Profile 27 27V N 59V2 81O 81U 81R 74TCS BF User SW name: xxx DATE: 10/08/2008 CB COMMANDS CB POSITION CB DIAGNOSTIC Binary IN1 Binary IN2 A 0 PLC state: RESET PLC version: Error: none Warning: none PLC STATES OFF OFF 59Uavg Start Uavg> OFF Trip Uavg> OFF BLK1 Uavg> OFF 59N Start UE> OFF Trip UE> OFF BLK1 UE> OFF Start UE>> OFF Trip UE>> OFF BLK1 UE>> OFF BF Trip Int/Ext OFF Start BF OFF Trip BF OFF BLK1 BF OFF PLC State 1: 0 PLC State 2: 0 PLC State x: 0 PLC State 32: 0 CB-OPEN Cmd OFF CB-CLOSE Cmd OFF CB state? State N.Open State tbreak OFF OFF UL Un UL Un UL Un UE UEn ULmax Un UL Un UEC UECn UL1avg Un UL2avg Un UL3avg Un ULavgmax Un U Un U Un UE-3rd UEn 27 f Hz Start U< OFF df/dt Hz/s Trip U< OFF BLK1 U< OFF Start U<< OFF Trip U<< OFF BLK1 U<< OFF 27V1 59 Start U1< OFF Start U> OFF Trip U1< OFF Trip U> OFF BLK1 U1< OFF BLK1 U> OFF Start U>> OFF 59V2 Trip U>> OFF Start U2> OFF BLK1 U>> OFF Trip U2> OFF BLK1 U2> OFF 81U State f< OFF 81O Start f< OFF State f> OFF Trip f< OFF Start f> OFF BLK1 f< OFF Trip f> OFF Start f<< OFF BLK1 f> OFF Trip f<< OFF Start f>> OFF BLK1 f<< OFF Trip f>> OFF Start f<<< OFF BLK1 f>> OFF Trip f<<< OFF BLK1 f<<< OFF Start f<<<< OFF Trip f<<<< OFF BLK1 f<<<< OFF 81R Start df> OFF 74TCS Trip df> OFF Start 74TCS OFF BLK1 df> OFF Trip 74TCS OFF Start df>> OFF BLK1 74TCS OFF Trip df>> OFF BLK1 df>> OFF Start df>>> OFF Trip df>>> OFF BLK1 df>>> OFF Start df>>>>off Trip df>>>>off BLK1 df>>>>off INTERNAL STATES INTERNAL STATES LEDs reset OFF Prof. switch OFF Block1: OFF TCS1 OFF TCS2 OFF Ext.trip BF OFF Remote trip OFF 52a OFF 52b OFF CB OPEN Cmd OFF CB CLOSE Cmd OFF CB Monitor OFF Reset count. OFF Fault trig OFF 74VT ext OFF f<-f>control OFF PROCEED READ MENU RELAYS K1 relay K1 coil K2 relay K2 coil K3 relay K3 coil K4 relay K4 coil K5 relay K5 coil K6 relay K6 coil OFF OK OFF OK OFF OK OFF OK OFF OK OFF OK NV10P_menu1.ai 122 NV10P - Manual SETTING AND COMMISSIONING

123 PREVIOUS READ MENU PARTIAL COUNTERS 27 Counters 27V1 Counters 59 Counters 59Uavg Counters 59N Counters 59V2 Counters 81O Counters 81U Counters 81R Counters ParStU<cnt 0 ParTrU<cnt 0 ParBk1U<cnt 0 ParStU<<cnt 0 ParRtU<<cnt 0 ParBk1U<<cnt 0 ParStUavg>cnt 0 ParTrUavg>cnt 0 ParBk1Uavg>cnt 0 ParStU2>cnt 0 ParTrU2>cnt 0 ParBk1U2>cnt 0 ParSt-f>cnt 0 ParTr-f>cnt 0 ParBk1-f>cnt 0 ParSt-f>>cnt 0 ParTr-f>>cnt 0 ParBk1-f>>cnt 0 ParStU1<cnt 0 ParTrU1<cnt 0 ParBk1U1<cnt 0 ParStU>cnt 0 ParTrU>cnt 0 ParBk1U>cnt 0 ParStU>>cnt 0 ParRtU>>cnt 0 ParBk1U>>cnt 0 ParStUE>cnt 0 ParTrUE>cnt 0 ParBk1UE>cnt 0 ParStUE>>cnt 0 ParRtUE>>cnt 0 ParBk1UE>>cnt 0 ParSt-f<cnt 0 ParTr-f<cnt 0 ParBk1-f<cnt 0 ParSt-f<<cnt 0 ParTr-f<<cnt 0 ParBk1-f<<cnt 0 ParSt-f<<<cnt 0 ParTr-f<<<cnt 0 ParBk1-f<<<cnt 0 ParSt-f<<<<cnt 0 ParTr-f<<<<cnt 0 ParBk1-f<<<<cnt 0 READ PROCEED SET MENU TOTAL COUNTERS SELF-TEST FAULT RECORDING EVENTS RECORDING ParSt-df>cnt 0 74TCS Counters ParTr74TCScnt 0 ParTr-df>cnt 0 ParBk1-74TCScnt 0 ParBk1-df>cnt 0 ParSt-df>>cnt 0 ParStBFcnt 0 ParTr-df>>cnt 0 BF Counters ParTrTrcnt 0 ParBk1-df>>cnt 0 ParBk1BFcnt 0 ParSt-df>>>cnt 0 ParTr-df>>>cnt 0 TotStU<cnt 0 ParBk1-df>>>>cnt 0 TotTrU<cnt 0 ParSt-df>>>>cnt 0 ParTr-df>>>>cnt 0 27 Counters TotBk1U<cnt 0 TotStU<<cnt 0 ParBk1-df>>>>cnt 0 TotRtU<<cnt 0 TotBk1U<<cnt 0 TotStU1<cnt 0 TotTrU1<cnt 0 27V1 Counters TotBk1U1<cnt 0 TotStU>cnt 0 59 Counters TotTrU>cnt 0 TotStUavg>cnt 0 TotBk1U>cnt 0 59Uavg Counters TotTrUavg>cnt 0 TotStU>>cnt 0 TotBk1Uavg>cnt 0 TotRtU>>cnt 0 TotBk1U>>cnt 0 59N Counters TotStUE>cnt 0 59V2 Counters TotStU2>cnt 0 TotTrUE>cnt 0 TotTrU2>cnt 0 TotBk1UE>cnt 0 TotBk1U2>cnt 0 TotStUE>>cnt 0 TotRtUE>>cnt 0 TotSt-f>cnt 0 TotBk1UE>>cnt 0 TotTr-f>cnt 0 TotSt-f<cnt 0 TotBk1-f>cnt 0 81O Counters TotTr-f<cnt 0 TotSt-f>>cnt 0 TotBk1-f<cnt 0 TotTr-f>>cnt 0 TotSt-f<<cnt 0 TotBk1-f>>cnt 0 TotTr-f<<cnt 0 81U Counters TotBk1-f<<cnt 0 81R Counters TotSt-f<<<cnt 0 74TCS Counters TotTr-f<<<cnt 0 TotTr74TCScnt 0 TotBk1-f<<<cnt 0 TotBk1-74TCScnt 0 TotSt-f<<<<cnt 0 TotStBFcnt 0 TotTr-f<<<<cnt 0 BF Counters TotTrTrcnt 0 TotBk1-f<<<<cnt 0 TotBk1BFcnt 0 TotSt-df>cnt 0 Protections TotTr-df>cnt 0 ON SERVICE TotBk1-df>cnt 0 Global self-test OK TotSt-df>>cnt 0 System OK TotTr-df>>cnt 0 Data-base: TotBk1-df>>cnt 0 boot OK TotSt-df>>>cnt 0 run-time OK TotTr-df>>>cnt 0 Data BUS: TotBk1-df>>>>cnt 0 heavy OK TotSt-df>>>>cnt 0 minor OK TotTr-df>>>>cnt 0 DSP: TotBk1-df>>>>cnt 0 state RUN boot OK I/O verify: run-time RUN boot OK major OK Ram: minor OK boot OK Fault 0 Cause: run-time OK I/O verify PLC: No faults Oscillography: boot OK Operating phase: run-time OK major OK minor OK Date: PLC: Time: boot OK MMI-board: UL1r: 0 Un run-time OK boot OK run-time OK UL2r: 0 Un Program OK UL3r: 0 Un UEr: 0 UEn Fault 0 (last) UECr: 0 UEn Fault 1 Fault.. cause: fr: 0 fn Fault 2 No faults dfr: 0 Hz/s Fault... Operating phase: Binary IN: Fault 299 Date: Relay OUT: Time: Event0 (last):...: IN1 on Eventxx: Date...: Settings Time Relay OUT: Date Time NV10P_menu2.ai SETTING AND COMMISSIONING NV10P - Manual

124 SET PROCEED SET MENU Plant... Reading RELATIVE BASE Un 100 V Unp 1000 V fn 50 Hz LANGUAGE English INPUTS RELAYS LEDs SELF-TEST RELAY MMI PROFILE A Binary input IN1 Binary input IN2 Binary input INx K1 relay K2 relay K3 relay K4 relay K5 relay Kx relay Start LED logic NO LATCHED Trip LED logic NO LATCHED LED 1 logic NO LATCHED LED 2 logic NO LATCHED LED 3 logic NO LATCHED LED 4 logic NO LATCHED LED x logic NO LATCHED Minor failure alarm YES Self-test relay - Param. setting enable PROCEED PROFILE A MENU Logic Active-ON ON Delay tin1on 0 s OFF Delay tin1off 0 s IN1 matching None Logic Active-ON ON Delay tin2on 0 s OFF Delay tin2off 0 s IN2 matching None Active Profle A Common 27 U< Element U<< Element 27V1 U1< Element Common 59 U> Element U>> Element 59Uavg 59N 59V2 ON Logic DE-ENERGIZED Mode NO LATCHED Min. pulse width ttr1 150 ms Logic DE-ENERGIZED Mode NO LATCHED Min. pulse width ttr6 150 ms Common Uavg> Element Common UE> Element UE>> Element U2> Element Utype27 Logic27 Uph-n OR U<<def enable OFF U<<def 0.5 Un tu<<def 1 s U<<BLK1 OFF U<disbyU<< OFF U<<BF OFF U<<disbyCB_OPEN OFF Relays U<< U<<ST-K - U<<TR-K - LEDs U<< U<<ST-L - U<<TR-L - U< Enable OFF Type Characteristic U<Curve DEFINITE U<def enable OFF U<def 0.5 Un tu<def 1 s U<inv enable OFF U<inv 0.5 Un tu<inv 10 s U<BLK1 OFF U<BF OFF U<disbyCB_OPEN OFF Relays U< U<ST-K - U<TR-K - LEDs U< U<ST-L - U<TR-L - U1<def enable OFF U1<def 0.5 En tu1<def 1 s U1<BLK1 OFF U1<BF OFF U1<disbyCB_OPEN OFF Relays U1< U1<ST-K - U1<TR-K - LEDs U1< U1<ST-L - U1<TR-L - Utype59 Uph-n Logic59 OR U> Enable OFF Type Characteristic U>>def enable OFF U>Curve DEFINITE U>>def 1 Un U>def enable OFF tu>>def 1 s U>def 1 Un U>>BLK1 OFF tu>def 1 s U>disbyU>> OFF U<inv enable OFF U>>BF OFF U>inv 1 Un U>>disbyCB_OPEN OFF tu>inv 10 s Relays U>> U>BLK1 OFF U>>ST-K - U>BF OFF U>>TR-K - U>disbyCB_OPEN OFF LEDs U>> Relays U> U>>ST-L - U>ST-K - U>>TR-L - U>TR-K - Utype59 Uph-n LEDs U> Logic59Uavg OR Uavg> enable OFF Uavg>def enableoff Uavg>def 1 En tuavg>def 600 s Uavg>BLK1 OFF Uavg>BF OFF Uavg>disbyCB_OPEN OFF Relays Uavg> Uavg>ST-K - Uavg>TR-K - LEDs Uavg> Uavg>ST-L - Uavg>TR-L - 3Votype59N 74VText59N UCE OFF tue>>res 0 s UE>>def enable OFF UE>>def 0.1 UECn tue>>def 1 s UE>>BLK1 OFF UE>disbyUE>> OFF UE>>BF OFF UE>>disbyCB_OPEN OFF Relays UE>> UE>>ST-K - UE>>TR-K - LEDs UE>> UE>>ST-L - UE>>TR-L - U>ST-L - U>TR-L - UE> Enable OFF tue>res 0 s Type Characteristic UE>Curve DEFINITE UE>def enable OFF UE>def 0.1 UECn tue>def 1 s UE<inv enable OFF UE>inv 0.1 UECn tue>inv 10 s UE>BLK1 OFF UE>BF OFF UE>disbyCB_OPEN OFF Relays UE> UE>ST-K - UE>TR-K - LEDs UE> UE>ST-L - UE>TR-L - U2>def enable OFF U2>def 0.1 En tu2>def 1 s U2>BLK1 OFF U2>BF OFF U2>disbyCB_OPEN OFF Relays U2> U2>ST-K - U2>TR-K - LEDs U2> U2>ST-L - U2>TR-L - NV10P_menuset1.ai 124 NV10P - Manual SETTING AND COMMISSIONING

125 PREVIOUS SET MENU SET PREVIOUS PROFILE A MENU 81O 81U 81R 74TCS BF PROFILE B PLC CIRCUIT BREAKER SUPERVISION REMOTE TRIPPING f> Element f>> Element f< Element f<< Element f<<< Element f<<<< Element df> Element df>> Element df>>> Element df>>>> Element 74TCS Enable OFF 74TCS-BLK1 OFF Relays 74TCS 74TCS-ST-K - 74TCS-TR-K - LEDs 74TCS 74TCS-ST-L - 74TCS-TR-L - BF Enable OFF tbf 1 s BF-BLK1 OFF Relays BF BF-ST-K - BF-TR-K - LEDs BF BF-ST-L - BF-TR-L - SAME FOR PROFILE A Enable Relays LEDS PLC SWITCHES PLC TIMERS LEDs-Relays allocation CB Diagnostic ON K1 L1 Relays RemTrip-K - LEDs RemTrip-L - f>>def enable OFF f>>def 1 fn tf>>def 1 s f>>blk1 OFF f>disbyf>> OFF f>>bf OFF f>>disbcb_open OFF Relays f>> f>>st-k - f>>tr-k - LEDs f>> f>>st-l - f>>tr-l - f<<def enable OFF f<<def 1 fn tf<<def 1 s f<<blk1 OFF f<disbyf<< OFF f<<bf OFF f<<disbcb_open OFF Relays f<< f<<st-k - f<<tr-k - LEDs f<< f<<st-l - f<<tr-l - Mode-df> Module df>def enable OFF df>def 1 Hz/s tf>def 1 s df>blk1 OFF df>bf OFF df>disbcb_open OFF Relays df> df>st-k - df>tr-k - LEDs df> df>st-l - df>tr-l - Mode-df>>>> Module df>>>>defenableoff df>>>>def 1 Hz/s tdf>>>>def 1 s df>>>>blk1 OFF df>disbydf>>>> OFF df>>disbydf>>>>off df>>>disbydf>>>>off df>>disbydf>>>>off df>>>>bf OFF df>>>>disbcb_open OFF Relays df>>>> df>>>>st-k - df>>>>tr-k - LEDs df>>>> df>>>>st-l - df>>>>tr-l - Switch 1: 0 Switch 2: 0 Switch x: 0 Switch 32: 0 PLC Timer 1: 0 PLC Timer 2: 0 PLC Timer x: 0 PLC Timer 24: 0 CBopen-K - CBclose-K - CBopen-L - CBclose-L - f<def enable OFF f<def 1 fn tf<def 1 s f<blk1 OFF f<bf OFF f<disbcb_open OFF Relays f< f<st-k - f<tr-k - LEDs f< f<st-l - f<tr-l - f< OFF f<u>> OFF f<digin OFF f<27v1 OFF f<59v2 OFF f<u< OFF f<rete61850-ko OFF f<res 0.1 s f<<<<def enableoff f<<<<def 1 fn tf<<<<def 1 s f<<<<blk1 OFF f<disbyf<<<< OFF f<<disbyf<<<< OFF f<<<disbyf<<<< OFF f<<<<bf OFF f<<<<disbcb_open OFF Relays f<<<< f<<<<st-k - f<<<<tr-k - LEDs f<<< f<<<<st-l - f<<<<tr-l - Mode-df>>> Module df>>>def enableoff df>>>def 1 Hz/s tdf>>>def 1 s df>>>blk1 OFF df>disbydf>>> OFF df>>disbydf>>> OFF df>>>bf OFF df>>>disbcb_open OFF Relays df>>> df>>>st-k - df>>>tr-k - LEDs df>>> df>>>st-l - df>>>tr-l - ModeN.Open OFF N.Open Mode-tOpen OFF Ktrig-break - tbreak 1 s Relays N.Open-K - tbreak-k - LEDs N.Open-L - tbreak-l - f>def enable OFF f>def 1 fn tf>def 1 s f>blk1 OFF f>bf OFF f>disbcb_open OFF Relays f> f>st-k - f>tr-k - LEDs f> f>st-l - f>tr-l - f> OFF f>u>> OFF f>digin OFF f>27v1 OFF f>59v2 OFF f>u< OFF f>rete61850-ko OFF f>res 0.1 s f<<<def enable OFF f<<<def 1 fn tf<<<def 1 s f<<<blk1 OFF f<disbyf<<< OFF f<<disbyf<<< OFF f<<<bf OFF f<<<disbcb_open OFF Relays f<<< f<<<st-k - f<<<tr-k - LEDs f<<< f<<<st-l - f<<<tr-l - Mode-df>> Module df>>def enable OFF df>>def 1 Hz/s tdf>>def 1 s df>>blk1 OFF df>disbydf>> OFF df>>bf OFF f<<<disbcb_open OFF Relays df>> df>>st-k - df>>tr-k - LEDs df>> df>>st-l - df>>tr-l - COMMUNICATION TEST RS485 Protocol Ethernet Parameters Test state: OFF Stop test? >> Start test? >> Test K1? >> Test K2? >> Test K3? >> Test K4? >> Test K5? >> Test K6? >> Protocol MODBUS Address baud IP Address SubNet Mask Autonegotiation ON NTP Synch. OFF NV10P_menuset2.ai SETTING AND COMMISSIONING NV10P - Manual

126 7.4 MAINTENANCE The Pro_N relays do not require any particular maintenance; all circuits use high quality static components, the subassembly products undergo dynamic checks on their functioning before the final assembling of the complete equipment. The dedicated circuits and the firmware for the self-test function continuously check the relay operation; the continuously operating auto-zeroing function dynamically corrects the measuring errors due to offset, heat dependent drifts, aging of components, etc. The microprocessor is equipped with a watch-dog circuit which restores the correct operation of the firmware in case of fault. The possibility of reading the value of the signals measured on the display (the NV10 relay used as an ammeter) allows one to check both the system parameters and the operation of the protection relays at any time. The NV10 relay can be preset as well to show the current values referred to the nominal current of the current transformers, as directly in primary amperes (according to the preset value of CT s nominal primary current); the same is done for the input voltages. If connected to the central control unit, all data available on the display can be checked and processed thus performing a continuous check and maintenance. 7.5 REPAIR 7.6 PACKAGING No repair of possible faults by the client is foreseen; if following to any irregularity of operation, the above tests confirm the presence of a fault, it will be necessary to send the relay to the factory for the repair and the consequent settings and checks. The Pro_N devices must be stored within the required temperature limits; the relative humidity should not cause condensation or formation of frost. It is recommended that the devices are stored in their packaging; in the case of long storage, especially in extreme climatic conditions, it is recommended that the device is supplied with power for some hours before the commissioning, in order to bring the circuits to the rating conditions and to stabilize the operation of the components. 126 NV10P - Manual SETTING AND COMMISSIONING

127 8 APPENDIX P 8.1 APPENDIX A1 - I/O Diagram NV10P OUTPUT RELAYS K1 K2 K3 K4 K5 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 D1 K6 A13 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 C1 C3 C5 C7 C2 C4 C6 C8 RX TX B1 B2 B3 B4 B5 B6 B7 B8 F1 F2 F3 F4 F5 B1 B2 B3 B4 B5 B6 B7 B8 U L1 U L2 U L3 U E VOLTAGE INPUTS A14 E1 A1 A2 U AUX A19 A20 A21 A22 IN1 IN2 BINARY INPUTS Measurement of input voltages by means of inductive VTs NV10P-I-O.ai APPENDIX NV10P - Manual

128 L1 L2 L3 NV10P K1 A3 A4 A5 P1 P2 OUTPUT RELAYS K2 K3 K4 K5 K6 A6 A7 A8 A9 A10 A11 A12 A13 A14 D1 A1 A2 C1 C2 A3 A4 A5 RX F1 F2 F3 DDI A6 A7 A8 TX F4 F5 A9 A10 A11 B1 B2 B3 A12 B4 A13 A14 A15 A16 L1 B5 B6 B7 B8 A17 A18 A19 A20 A21 L2 L3 A1 A2 U AUX A22 E1 A19 A20 A21 A22 IN1 IN2 BINARY INPUTS Misura delle tensioni d entrata mediante sensori 128 NV10P - Manual APPENDIX

129 OUTPUT OUTPUT OUTPUT INPUT INPUT INPUT ON BUS RUN APPENDIX A2 - Interfaces RS485 F1 F2 F3 F4 F5 B- Supervision A+ unit ETHERNET D1 HUB THYBUS E MODULO PT100 PT100 MODULE ON BUS RUN MPT N.8 Pt MODULO INGRESSI REMOTI ON BUS RUN MID16 N.16 binary inputs OUTPUT INPUT MODULO 4 RELE + 8 INGRESSI DIGITALI MODULO INGRESSI REMOTI 4 RELAYS + 8 BINARY INPUTS MODULE ON BUS RUN MID8 MRI N.8 binary inputs + 4 output relay RS232 FRONT PANEL Interfaces.ai APPENDIX NV10P - Manual

130 8.3 APPENDIX A3 - Protective functions NV10P inductive VTs inputs B7 B8 U E 59N B1 B2 B3 U 12 74TCS 81O BF 81U ARF 81R 59Uavg B4 B5 U V V2 B6 U 31 Electronic sensor inputs I Σ 81O 81U Uavg U 12, U 23, U 31 59V2 27V1 BF ARF U EC 59N BF A19 A20 A21 A22 BINARY INPUTS 130 NV10P - Manual APPENDIX